PP Plastic case Material: Modified PPTwo Press & Pull Latches O-ring seal Automatic Pressure Equalization ValveComfortable rubber over-molded handle Two Padlockable Hasps Powerful stainless steel hinges Life time guarantee Anti shock, waterproof, airproof, dustproof, anti high or low temperature(-40°C to 98°C), environment-friendly products.Technique: injection molding technologySpecification:Exterior dimensions: 488mmx397mmx198mmInteriors dimensions: 460mmx330mmx185mmLid depth: 50mmBottom depth: 135mmTotal depth: 185mmWeight:3.5kgs