The Oath Carcass clamp is an ultra light clamp that maintains a solid rib cage frame to lock your bars down tight. What's in the Box? 1 clamp & shim Specs Weight: 59g / 0.13lbs Material: 6061 T6 aluminium Diameter: Oversized 34.9mm / Standard 31.8mm shim included Height: 30mm / 1.18" Bolts: M8 Fit : IHC and HIC