Tubing connector, used to connect flexible tubing (1/4", 3/8", 1/2", 3/4", 1"id) to #7, #11, #15 or #25 can accommodate-thred for easy, safe connect/Disconnect. 5029/7506 nylon Bushing slides over serrated end and secures PP connector in thread with silicone O-Ring in front groove to make vacuum tight compression seal. Temperature range is -20 to 110 Degrees C. Always add or remove tubing from the hose barb while the connector is Unthreaded from the glass