Description The Zefal Gizmo Universal is a clamp mount that allows you to run a bottle cage where there weren’t any bosses for you to do so. This clamp is tough but will not damage your bike’s frame. ZEFAL GIZMO UNIVERSAL SPECS Weight 2 x 18 g Material – Thermoplastic resin Black Screws Provided Compatible with frame diameter Ø 15 mm – Ø 75 mm