Product Description Technical Information:Material:aluminium (6061)Stem Size:1 1/8" , threadlessOuter Diameter:26.0 mmFeatures:is installed instead of the normal top capenables the mounting of lighting, computer, etc. directly above the stemManufacturer Numbers:black:PC360BLACKsilver:PC360SILVERContents:1 x Weight: black: 24 g Manufacturer: PAUL Component Engineering 11204 Midway Chico CA 95928 USA info@paulcomp.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de