(silver 11T)Aluminium Bicycle Pulley Jockey Wheel Bearing Derailleur Bike..

Feature: \n 1. Made of CNC aluminum alloy, lightweight and durable\n2. Anti rust and corrosion resistant anodized\n3. These pulleys run on smooth ball bearings\n4. A necessary accessory for your bicycle\n5. Apply for most of rear derailleur on the market, support 7/8/9/10 speed \n\nSpecification: \n\nDescription: \n\nAnodized CNC machined bicycle jockey wheel with fully rubber sealed bearing for center bolt derailleurs. It run on smooth ball \nbearings, and it's a necessary accessory for your bicycle. There are \nthree different colors for you to choose from, to meet different \nneeds. Fits for most of rear derailleur on the market, support 7/8/9/10 speed. Hope you will enjoy \nyour cycling. Have a nice day. \n\nFeatures: \n\n1. Made of CNC aluminum alloy, lightweight and durable. \n\n2. Anti rust and corrosion resistant anodized.\n\n3. These pulleys run on smooth ball bearings.\n\n4. A necessary accessory for your bicycle. \n\n5. Apply for most of rear derailleur on t: