STAINLESS STEEL PREFORMED BAND CLAMP IS 3/16" WIDE AND 13/16" INSIDE (BEFORE INSTALLATION) TO FIT MOST 3/8" AND 1/2" HOSES.  THESE CLAMPS CAN BE USED WITH BOTH CENTER PUNCH AND ROLL-OVER TYPE TOOLS.  USE TWO CLAMPS WITH OUR KHN STYLE LONGER BARB FITTINGS FOR ADDITIONAL STRENGTH.