Product Description The prevents the chain from jumping off even during full sprints. It is attached to the front derailleur mounting base. Specifications:Application:Road, Cyclocross, GravelMaterial:aluminium (6061-T6)Mount:front derailleurCapacity:36 - 54 teethFeatures:CNC machined aluminiumadjustable in various waysclean, quiet chain guidetested by Trek-Segafredo and Telenet Fidea Lions during the Tour de France and the Cyclocross World CupManufacturer Number:K13-080 Contents:1 x 1 x K-EDGE mounting plate1 x K-EDGE fastening bolt Weight: black | Front Derailleur: 50 g Manufacturer: K-EDGE 418 S. 9th St. Boise ID 83702 USA info@k-edge.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com