Product Description Stem spacer for 1 1/8" stem clamp. Technical Information:Material:CarbonCompatibility:1 1/8"Sizes:10 mm, 20 mmFeatures:with FSA logoroutings on the insideManufacturer Numbers:10 mm:160-432520 mm:160-4326Contents:1 x FSA H2373 carbon spacer Manufacturer: F.S.A. S.R.L. Via Francesco Petrarca. 4 20123 Milan Italy info@fullspeedahead.com