Size:1-1/2 in. ID, fits 1-1/2 in. OD pipe, 1 Piece of 100% U-Bolt Muffler/Exhaust Clamp. Superior Seal and High Clamp Loads Prevent Exhuast Gas and Noise From Leaking. Function: Compress a Flex Pipe, Reattach a Diesel/Gas Exhaust Tip, or Even Use On a Fence Gate.