Work more than 2 hours below 300bar 2? Liquid cool down, reduce core temperature 3? High-pressure piston head core :pressurized design, can reach the role of self-compensation after wear 4? Copper unidirectional valve: durable, failure rate is low.The product came very well packaged. This item is in the category "Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors". The seller is "snihanany_0" and is located in this country: CN. This item can be shipped worldwide.