The Deda Quill to A-head stem adaptor allows you to fit a threadless (A-head) stem on traditional threaded fork and headset. It will fit a 1" stem as standard, or use the Condor A-Head Stem Shim (available separately) to fit a 1 1/8" stem. This adapter will allow you to fit an ahead style stem to a bike which has old style quill type stem. Stem fitting 25.4mm 1" (to use a 1 1/8" stem you would also need a shim). Quill Diameter 22.2mm. Weight: approx 140g. Length: 130mm. Minimum insert is 65mm from the top. Colour: Black.