... O.D tubingCM-806-A-R410A For R410A bar: 1/4", 5/16",3/8",1/2",5/8"& ... O.D.tubingCM-808-A-R410A For R410A bar: 3/16",1/4",5/16",3/8",1/2",5/8"& ... 3/4" O.D. tubingCM-808-M-R410A For ... 18mm O.D tubingDetails:1. Special design for R410A system, also fit for usual tubing.2. Easy operation, save ... , make the idle top head in revolution again for 1-2 times and have the flare face in ...