Transair 1/4" Female Body Coupler with 3/8" NPT Thread (ARO Profile) - Transair composite automatic couplers are lightweight and robust, ensuring very high flow, extremely low pressure loss, and fast vent time. Featuring an improved hand grip for quick and repetitive connection and disconnection, couplers are ISO 4414 and European EN 983 compliant and suitable for compressed air, argon, and nitrogen. NOTE: This product can only be purchased in quantities of 6.