3U 24 Inch Deep Static Shock Rack 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. Molded of LMDP Linear Medium Density Polyethylene plastic that meets or exceed MIL-STD 810G standards and includes 8 elastomeric shock absorbers which allows a standard payload range of 40 to 150 pounds. Optional extended payload range of 160 to 300 pounds can be accommodated as a special order option. The rugged roto-molded shell ensures industry leading strength and impact resistance. 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.