Product Description Set for individual adjustment of the attachment height. Technical Information:Clamp Diameter:31.8 mmCompatibility:Profile Design aerobarsModels:15 mm 2 x 10 mm fitting2 x 5 mm riser 20 mm 2 x 20 mm riser 30 mm 2 x 30 mm riser 40 mm 2 x 40 mm riser 50 mm 2 x 50 mm riser 60 mm 2 x 60 mm riser 70 mm 2 x 70 mm riserContents:1 x incl. bolts Manufacturer: Profile Design LLC 2677 Waiwai Loop Honolulu HI 96819 USA info@profile-design.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com