Carlson's Long Beard XR 12 GA Choke Tubes Fits Browning Invector plus shotguns (.665 constriction) Manufactured from 17-4 stainless steel Features shot-look technology that allows for the tightest patterns and longer downrange reach over any turkey load on the market Has a 25% longer Parallel section, thus throwing tighter and denser patterns downrange Triple shot technology reduces pellet deformation, shortened shot string and has less Flyers