[Material]All the are made of Solid Brass construction. Compared with stainless steel and plastic, it is more corrosion-resistant and durable, and can the needs of air pumping and air pressure measurement in scenarios. [Chucks' Size]The closed air chuck has 1/4inch FNPT air inlet,ball air chuck function is to enable the shutoff valve to shut down the air when the is not opened. The Closed Tire Chuck also has 1/4inch Female THREADS fit air inflators. The Dual Head Air Chuck has 1/4inch FNPT air inlet,the maximum air pressure is 150 pounds per square inch.All the thread is 1/4inch Female ,suit for any 1/4inch Male fittings. [Adapters' Size]1/4inch Coupling x 1/4inch Male Threaded Full Quick Connect which can be used with the 1/4inch Female air chuck. Colour: gold Material: brass Package Contents: 1 * closed air chuck 1 * closed tire chuck 1 * dual head air chuck 3 * air hose quick connect adapter 1 * raw material tape (random color, 't accept the specified color) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.