Trailer Medium Wheeled Pull Handle Protective Case - Image 2

Trailer Medium Wheeled Pull Handle Protective Case

Waterproof and dustproof tool storage box made of PP material, customized internal partitions are available!

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Description

Product Introduction

This extended four-wheel trolley protective case is specially designed for complete heavy-duty tool sets carried on trailers and trucks, long studio lighting equipment, large detection instruments and full percussion instrument accessories. It is equipped with a hidden extended retractable pull rod on the back and dual load-bearing rollers at the bottom. Combined with a main front handle and two side handles, the multi-mode carrying structure greatly eases transportation. Outside dimension of 797*517*313mm（31.38”*20.35”*12.32”in）and internal dimensions of 737*457*273mm（29.02”*17.99”*10.75”in）. The case net weight is 10.25KG.

The case is integrally injection-molded with thickened modified PP alloy for military use. Its entire shell is reinforced with thickened grid-shaped three-dimensional ribs, fitted with multiple sets of symmetric heavy-duty synchronous latches, an independent air pressure balance relief valve on the front, and an extra-wide mildew-proof sealing rubber ring all around, meeting military-grade protection standards of IP67 dust and water resistance, heavy load buffering and shock resistance. Two basic internal configurations are available: an empty bare compartment and a set of high-density wave-shaped shock-absorbing sponge for the lid. Customization of one-piece CNC milled EVA liners is supported. The extended and spacious inner compartment can hold long strip lamps, long pipeline detectors, complete trailer maintenance tool sets and full drum kit hardware. Equipped with a multi-mode carrying design featuring pull rods and rollers, it is suitable for storage on tow trucks, cross-city outdoor shooting for film crews, long-term field engineering surveys and equipment consignment for large-scale exhibitions. It addresses industry pain points such as labor-intensive single-person transport of heavy elongated equipment, extrusion deformation during long-distance logistics, and moisture-induced malfunctions of precision electronic devices. It serves as a dedicated extended mobile protective storage carrier for freight fleets, film and television studios, testing institutions and professional bands.

Core Selling Points

IP67 full-perimeter widened sealing, all-weather waterproof, dustproof and moisture-proof for vehicle-mounted and outdoor use

The case opening is fitted with an integrated widened mildew-proof rubber sealing ring, which presses evenly against the case all around after closing. It can block rainwater, sediment and moisture for outdoor emergency repairs on rainy days, dusty mining work, trailers parked outdoors and humid seaside sites, preventing rust on metal tools, short circuits of detection instruments, as well as dust accumulation and scratches on lenses.

Full-body grid three-dimensional thickened anti-collision ribs, impact-resistant and crack-proof under heavy loads

Integrated protruding grid reinforcing ribs are formed on all six sides of the case without weak splicing gaps. It resists denting, cracking and deformation during loading/unloading bumps, drops from height and multi-layer heavy stacking, fully safeguarding valuable internal equipment during long-distance logistics transfer and hard-object collisions on construction sites.

Hidden extended retractable metal pull rod + dual load-bearing silent bottom rollers

A hidden multi-speed extended metal pull rod on the rear fits flush with the case when retracted without occupying stacking space. Reinforced dual load-bearing rollers with wear-resistant smooth bearings allow effortless rolling of fully loaded long heavy equipment on flat ground, drastically cutting physical fatigue for single-person long-distance transport.

Three-sided anti-slip reinforced handles for flexible short-distance transfer in diverse scenarios

Equipped with a main anti-slip front handle and symmetric embedded side handles on left and right, all reinforced by multi-layer mechanical riveting. When the pull rod cannot be extended inside trailer compartments, compact stages or stairwells, multi-angle hand lifting enables easy movement. The curved anti-slip grip prevents hand abrasion during prolonged carrying.

Sets of symmetric synchronous heavy-duty latches with anti-theft padlock holes for secure closure

Multiple widened thickened self-locking spring latches on upper and lower shells compress the case synchronously upon closing to maintain tight sealing, avoiding accidental pop-open under bumpy high-speed trailer travel and long-distance logistics shipment. Each latch reserves a standard padlock hole for anti-theft locking during equipment storage and intercity transport.

Front independent air pressure balance relief valve, no negative pressure jamming when opening across regions

The waterproof pressure relief valve automatically balances internal and external air pressure. No negative pressure suction of the lid occurs during intercity field work or plateau surveying, eliminating strenuous prying and enabling smooth, effortless opening anywhere.

Extended spacious inner compartment + customizable one-piece liner, separate fixing for long oversized equipment

The elongated roomy interior accommodates long lighting fixtures, pipeline detectors and complete trailer repair tool kits. Wave-shaped shock-absorbing foam sets come as standard, with custom integrated slotted one-piece EVA liners available. Separate shaped slots hold long equipment firmly to prevent sliding, friction, scratches and knocks during rolling transit.

Military-grade weather-resistant thickened raw material, long-term stability under extreme high & low temperature vehicle conditions

The material is blended with high-content UV-resistant and cold-resistant modifiers to retain stable toughness across temperature extremes. It will not turn white, become brittle, soften or deform under long-term use such as summer outdoor trailer exposure under blazing sun or winter below-zero roadside emergency repairs.

Specification Table

Item	Specifications
OD	797517313mm（31.38”20.35”12.32”in）
ID	737457273mm（29.02”17.99”10.75”in）
NW	10.25KG
Material	Military-grade thickened high-toughness modified PP engineering plastic
Protection Rating	IP67 waterproof and dustproof rating
Basics Accesspries	Multiple sets of synchronous heavy-duty spring latches, waterproof pressure relief valve, main front handle + dual auxiliary side handles, hidden extended retractable metal pull rod, dual load-bearing silent bottom rollers, full-circumference widened mildew-proof sealing gasket, extended continuous hinges
Oprional Lining	Empty case, high-density wave shock-absorbing foam for case lid, one-piece CNC integrated molded positioning EVA liner

Details Display

Hidden extended retractable metal pull rod + four load-bearing rollers at the bottom

Hidden extended multi-speed metal pull rod at the back fits users of different heights, lying flush with the case without protrusion when retracted. Widened reinforced silent rollers at the bottom roll smoothly and quietly under heavy loads, and thickened bearing structure greatly improves long-term durability.

Multiple groups of symmetrical synchronous self-locking spring latches on upper and lower shells

Military-grade widened latches are evenly distributed on the top and bottom of the case. Multiple latches lock synchronously to reliably guarantee sealing performance. Each latch is reserved with a standard padlock hole. You may install padlocks during long-distance trailer transportation or equipment storage at exhibitions to prevent loss of tools and instruments.

High-density thickened wave shock-absorbing sponge for case lid

Optional high-density thickened wave sponge can be attached to the case lid. When the case is closed, it fully wraps the long equipment inside. It provides powerful shock absorption against bumps during vehicle transportation and long-distance logistics, preventing scratches and collision damage to instrument housings, lamp paint surfaces and lenses.

Three-sided non-slip reinforced handles with multi-layer riveting structure

Recessed anti-slip handles are equipped on the front, left and right sides of the case. Multi-layer mechanical riveting technology greatly enhances load-bearing strength. When the pull rod cannot be extended due to space constraints, the case can be carried by hand from multiple angles for flexible movement in narrow carriages and backstage areas.

Color Selection and Customization Services

Color Options

Matte military black is available in regular stock. It resists engine oil, construction mud and scratches from branches, and oil stains can be wiped off easily. For bulk orders, custom colors such as military green and industrial orange are supported. The blank flat area on the front of the case can be processed with laser engraving and silk-screen printed logos.

Customization Servcies

Logo Marking：The flat front surface of the case supports laser engraving and silk-screen printing for auto repair shop logos, photography studio marks, and corporate equipment serial numbers.

Custom grooved one-piece liner: Based on dimension drawings of complete auto repair tool sets, full photography & video kits and surveying equipment, integrated one-piece EVA is CNC milled with separate divided slots to fix multiple devices individually.

Full OEM&ODM Customization：For bulk orders, wall thickness, number of latches and liner structure can be customized to meet exclusive storage demands across multiple industries including auto maintenance, commercial photography, field surveying and outdoor camping.

Bulk procurement cooperation: Chain auto repair shops, photography media companies, surveying institutions and outdoor clubs can enjoy tiered discounts for bulk orders, and official VAT invoices are available.

Application Scenarios

On-board storage of complete heavy-duty maintenance tools for trailers and trucks:

it can fully store heavy socket sets, pipeline repair tools, full vehicle fault detectors and other equipment. The pull rod and roller design facilitate transportation for outdoor emergency repairs, and its waterproof & moisture-proof function prevents metal tools from rusting under open-air storage conditions.

Storage for full sets of long studio lighting equipment for outdoor shooting:

it holds long fill lights, high-capacity batteries and extended light stands as a complete kit. The pull rod and rollers save labor for crew cross-city outdoor shooting, offering all-weather protection in rainy and sandy outdoor environments.

Field transportation for industrial long pipeline detection instruments:

capable of storing complete sets of extended pipeline endoscopes and long sensor detection equipment. The shockproof structure stabilizes instrument detection accuracy, delivering dustproof and waterproof protection for mining areas and outdoor construction sites.

Storage for drum kit hardware of professional bands on long tours:

it accommodates extended cymbals, long drum stands and full percussion accessories. The four-wheel trolley design enables easy transportation for nationwide performances, isolating moisture and dust on stage to protect metal drum hardware.

Carrying extended surveying instruments for field engineering:

stores extended ranging poles and complete long geological sampling tools, rolling effortlessly on flat ground via built-in wheels. It provides full anti-drop and waterproof protection in heavy rain and dusty mining areas.

Logistics shipment of precision long equipment for large industrial exhibitions:

Fully holds long demonstration detectors and display light sets. The case is compression and extrusion resistant and lockable to fully secure exhibits during transit.

Cross-city inspection transportation of extended optical lens assemblies for laboratories:

Stores long optical lenses and sensor components for delivery inspection. Moisture-proof and dustproof construction reduces wear of precision electronic components.

On-board storage of complete equipment for trailers and engineering vehicles:

All vehicle maintenance tools can be neatly stored in trailer cargo holds. The trolley design eases loading and unloading during long-distance trips, and no collision noise will be generated even under bumpy driving conditions.

Material and Process Description

Main case material:

thickened military modified PP alloy with double-layer thick wall & grid reinforcing ribs. It features high impact resistance, cold resistance and anti-UV performance, resistant to trailer engine oil and mild acid & alkali corrosion, and not easy to crack under long-term outdoor vehicle-mounted working conditions.

Sealing gasket:

Full-circle widened and thickened mildew-resistant natural rubber with lasting stable resilience. It resists hardening and cracking after repeated opening and closing, and consistently maintains IP67 waterproof and dustproof sealing performance.

Metal fittings:

Pull rods, hinges and lock hardware are double electroplated for rust prevention, free from rust and jamming in humid construction sites and coastal high-humidity outdoor environments. The rollers are equipped with thickened wear-resistant silent bearings for quiet and durable rolling.

Molding process:

High-pressure integrated injection molding with no spliced gaps, delivering outstanding structural integrity to eliminate risks of water/oil leakage and stress cracking.

Assembly Process:

Latches, extended pull rods and three-side carrying handles are all reinforced via multi-layer mechanical riveting. They will not loosen or fall off even under long-term heavy-load pulling and frequent opening/closing. The rubber sealing ring is installed in an embedded clamping groove to prevent shifting and detachment.

Lining Manufacturing Process:

The entire high-density EVA liner is CNC integrally cut to perfectly fit the contours of long equipment and complete tool sets. Thickened wavy sponge is integrally bonded to the lid, delivering long-lasting and stable shock absorption under heavy loads.

Packaging and Delivery

Individual Packaging: Each case is separately packed in a thick corrugated carton with foam corner protection to avoid bumps and scratches during logistics transit.

Delivery Lead Time: Bare cases and foam-lined models are in stock and shipped out within 48 hours; orders with logo engraving and custom EVA liners take 15 working days for delivery.

Logistics Options: Small sample orders are delivered by express delivery directly; bulk orders are shipped via dedicated full-truck logistics with more favorable freight rates.

Packing List: Main protective case; optional wave foam or EVA liner delivered together with the case.

FAQ

Q1:What long equipment can this extended case hold? How to maintain the wheels for daily use?

A：It is suitable for long complete equipment such as trailer repair tools, long film and television lights, pipeline detectors, and extended drum accessories. Roll the case on flat ground in daily use and avoid frequently dragging it up and down steps to reduce wear on wheel bearings.

Q2:Can I replace parts separately if the extended retractable back rod gets stuck or broken?

A：The pull rod is a standard universal component. There is no need to replace the whole case. Contact customer service with your case model to purchase a separate pull rod replacement.

Q3:What accessories should be matched with the latches if I check this extended case on a flight?

A:The original latches only fit ordinary mechanical padlocks. A customs lock is recommended for air consignment. The fully protective structure of the case meets the requirements for large air cargo shipment. A custom EVA liner can better secure long equipment inside.

Q4:The inner compartment length is 737mm. How do I tell if my long instrument or drum accessory fits inside?

A:Measure the overall length of your gear and compare it with the internal length of 737mm. If your equipment exceeds the inner dimension, consult customer service about our extra-long protective case models.

Q5:Will the case crack easily when used outdoors in cold winter temperatures?

A:Cold-resistant modifiers are blended into the raw material, so it won’t turn brittle or crack under normal sub-zero outdoor conditions. Avoid hard violent impacts when the case is cold.

Q6:What’s the MOQ for custom EVA liners? Can multiple accessories be stored separately?

A:The minimum order quantity for custom molded liners is 300 pieces. Independent recesses can be milled for main equipment and small accessories for classified storage.

Q7:How to clean a dirty case?

A：Use a soft brush to clear sand and dirt from gaps, wipe the surface with a damp cloth and neutral detergent, then air-dry in a cool place. Do not spray high-pressure water directly onto latches and sealing areas.