Good protection for your values when shippment. Modified PP Plastic case Interior size: 300x220x115mm Exterior size:330x280x132mm Material: Modified PPTwo Press & Pull Latches O-ring seal 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 technology