1.Long miliatary rifle cases 2.waterproof, airproof, dustproof, 3.environment-friendly products 4.anti hot or cold This model is with two wheelsMaterial: Modified PP Two Press & Pull Latches O-ring seal Pressure Equalization Valve Comfortable rubber over-molded handle Two Padlockable Hasps Powerful stainless steel hinges Lifetime guarantee Anti shock, waterproof, airproof, dustproof, anti high or ...