The DEWALT 25 Piece Industrial Coupler & Air Accessory Kit comes with various air compressor accessories to help you connect air tools and hoses to compressor. The fittings are all 1/4-inch pipe thread and plugs and couplers are 1/4-inch industrial style. A blow gun is also included and can be used for cleaning various surfaces. The complete it includes: 1/4-inch FNPT couplers (2 pcs), 1/4-inch MNPT coupler (1pc), 1/4-inch FNPT plugs (3pcs), 1/4-inch MNPT plugs (5pcs), 1/4-inch MNPT x 1/4-inch MNPT Close Hex Connectors (2pcs), 1/4-inch FNPT x 1/4-inch FNPT Hex Connector (1pc), Hand Held Air Gun (1pc), Rubber Tip (1pc), Venturi Tip (1 pc), Inflation Needle (1pc), Needle Tip Adaptor (1pc), Ball Foot Chuck (1pc), 0-60 PSI Pencil Gauge (1pc), 6-inch Dual Foot Chuck (1pc), Teflon Tape (1 roll), and a reusable case to help prevents against the loss of small parts and make storage easy.