Made for 397 aac, bore size is 1.11". Comes in brown, to match wire code. Works on taihan Hendrix and Southwire brands. May fit other sizes of conductor if the od is between 1.070 and 1.11". Attaches to our al6, al24 and cf24 tubes. 

Also works on 30/7 336 acsr. works on 336 acsr 18/1 but fit is loose and requires proper adjustment to minimize damage to bare conductor.