The Freeman AP1414A 1/4 in. x 1/4 in. Automotive Pneumatic Accessory Pack (18-piece) offers a great variety of pneumatic fittings at a great price. Accessories include snap-in connectors, brass couplers, tire and sports equipment inflators, and Teflon thread tape. The 1/4 in. x 1/4 in. Automotive Pneumatic Accessory Pack (18-piece) is an excellent kit whether you are just getting started with pneumatics or are restocking your supply, and will allow you to tackle your inflation needs fast and easy.