SKB's 3RS Series Static Shock Rack Transport cases are available in 7 sizes, 3U,4U, 5U, 7U, 9U, 11U and 14U.These Static Shock Racks are lightweight, shockproof, watertight, dustproof, heat and chemical resistant, perfect for protecting and transporting your sensitive electronic equipment. The inner rack chassis is built of high strength/lightweight aluminum alloy extrusions with 11 gauge hot rolled carbon steel rack rails to meet EIA-310 standards. Shock and vibration mitigation is accomplished with eight (8) elastomeric isolators rated for a payload range of 40 lbs to 150 lbs in a standard configuration. Optional extended payload range of 160 to 300 pounds can be accommodated as a special order option. The interior frame and shocks provide adequate sway space for ambient air circulation and heat dissipation. The 3RS Series Static Shock Racks are available in 24" or 30" deep from rail to rail with a standard 19" rack width per ANSI/EIA-310-C specification and feature square-hole rack rails to accommodate either 10-32 US standard, or 6mm International standard cage nuts which are supplied with the cases. Molded of LMDP Linear Medium Density Polyethylene plastic that meets or exceed MIL-STD 810G standards. The rugged roto-molded shell ensures industry leading strength and impact resistance. The standard COTS (commercial off the shelf) case comes with a 2" deep front lid and a 5" deep rear lid to accommodate rack gear that is longer than 24", and edge casters to allow convenient case transport. Molded-in stacking ribs and lugs are designed to stack with competitive manufacturers cases. Black powder coated stainless steel hardware are recessed for protection is standard as well as 8 comfort grip spring loaded lift handles which allow for easy movement. An automatic pressure relief valve is another standard feature along with gasket sealed lids that include convenient lid hangers to store your lids when your equipment is in operation. Coupling straps are included for securing the racks together when stacked. Standard color is Black, also available in Desert Tan or OD Green.