About this item【Exclusive Design 】 4U Rack Case with robust roto-molded HDPE design, Our Racks are watertight, dustproof and impact resistant, When encountering stormy weather, your valuable gear is fully protected.【Material】 Rack Cases are composed of High Density Polyethylene ( HDPE ). Known for its outstanding tensile strength and large strength-to-density ratio, HDPE plastic has a high-impact resistance.【Shock Mount Racks】 The HDPE rack case is both UV‑resistant and shockproof, The internal concave convex design of the case greatly increases the load-bearing capacity of the box, and can be used as a double-layer anti vibration U-box, ensuring that the case can take a beating and continue to provide full protection for your valuable equipment.【Rack Case】 For Use with Standard 19" Rack Mountable Equipment. Sizes suited to protect equipment such as: Equalizers, Amplifiers, Speakers, Sound Console, Mixers, Effects Machines and Computer Servers. Make setup even faster and transportation simpler is the way to go.【Distinctive Features】 The shock mount rack case features front and rear doors, an easy-setup stack-able exterior design, Built-in storage space for microphone storage, and ergonomic, rubber covered handle, Four 6mm padlock holes for theft protection.