Ace Safe threaded tubing connectors used to connect flexible tubing to #7,#11 or #15 Ace-Threds. Allows for easier connect-disconnect of tubing. A much safer design than glass hose barbs. All PTFE construction for lower extractables and higher temperature capability than the standard Nylon/polypropylene version. This version also uses a FETFE o-ring and has an upper temperature limit of 200 degrees C.