SKB Roto-X series rotationally molded shipping containers with the Roto X pattern. These Roto-X cases stack securely for efficient transport and storage. Recessed, heavy-duty twist latches will accommodate a customer-supplied padlock. Spring-loaded handles are also recessed for protection.  Rotationally molded for high strength and impact resistance. ATA Rated: ATA 300 Category 1. ATA (Air Transport Association) specification 300, category 1 is the highest standard for an airline transport container (a minimum of 100 common carrier trips).