CLOSED FLOW AIR CHUCK :with 1/4inch FNPT air inlet, its function is to enable the shutoff valve to shut down the air flow when the stem is not opened.300 psi maximum air pressure. Suitable for commercial and industrial air filling applications. HEAVY DUTY BRASS CONSTRUCTION:Sturdy accessories, not easy to break, .The air chuck set is made of quality brass 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<br><br>Colour:gold+silver Material:Metal<br><br>Package Contents: 4 x Tire Chuck 1 x raw material belt<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.