[Material]All the products are made of Solid Brass construction. Compared with stainless steel and plastic, it is more corrosion-resistant and durable, and can meet the needs of pumping and pressure measurement in various scenarios.[Chucks' Size]The closed flow chuck has 1/4inch FNPT inlet,ball chuck function is to enable the shutoff valve to shut down the flow when the stem is not opened. The Closed Flow Tire Chuck also has 1/4inch Female NPT THREADS fit most inflators. The Dual Head Chuck has 1/4inch FNPT inlet,the maximum pressure is 150 pounds per square inch.All the thread is 1/4inch Female NPT,suit for any 1/4inch Male NPT fittings.[Adapters' Size]1/4inch Coupling x 1/4inch Male NPT Threaded Full Flow Quick Connect which can be used with the 1/4inch Female NPT chuck.Colour: goldMaterial: brassPackage Contents:1 * closed flow chuck1 * closed flow tire chuck1 * dual head chuck3 * hose quick connect adapter1 * raw material tape (random color, don't accept the specified color)Only the above package content, other products are not included.Note: Light 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.