Item Type: Air Coupler Plug Kit_x000D_ Joint Size(male or female): 3/8in NPT_x000D_ Access Type: Fast connect_x000D_ Application: Air hose quick connection connector 1COUPLER PLUG: The air hose fittings include 2 3/8 body air couplers with 3/8in NPT thread and 2 3/8 body air plugs with 3/8in NPT thread 23/8IN HIGH FLOW BODY: This air connector is suitable for high flow air tools, with 3/8in bodies providing up to 70% more air flow than 1/4in bodies 3COMMON USE: The air coupler plug kit connect with accessories of the same type and size from other brands. Maximum operating pressure of 300PSI, temperature up to 250 degrees Fahrenheit 4SIX LOCKING BALLS: There are six locking balls in the connector to securely secure the plug. Socket guards help reduce the possibility of accidental disconnections 5DURABLE CONSTRUCTION: The heat treated steel structure of air hose connectors fittings has high corrosion resistance and long service life. Thickened coating for increased durability and reliability4 x Air Coupler Plug KitEnsure that the desired thread size is 3/8in NPT thread.