HEAVY DUTY BRASS CONSTRUCTION:Sturdy accessories, not easy to break, .The air chuck set is made of quality brass CLOSED AIR CHUCK :with 1/4inch FNPT air inlet, its function is to enable the shutoff valve to shut down the air when the stem is not opened.300 psi maximum air pressure. Suitable for commercial and industrial air filling applications. Easy To Use: Two ways to connect to meet your needs.When you want to use closed ball tire air chuck, just needs to be connected by screw rotation Wide application: Quick Connect Tire Inflator Chuck, designed to use with inflator pressure gauge, working for air tool line. and also can be applied for trucks, buses, cars, bicycles, motorcycles and more, Weight: 220.5 pounds, Manufacturer: IJSDNVJNDX