Description: Premium nylon chain keeper sleeping hub - high strength, lightweight and Used to keep the chain tension, away from the frame and from tangled Easy to install and convenient to use -just simply remove the rear wheel and fit the chain keeper in the wheel dropout Suitable for all derailleurs and 1/8" chains 12mm tu axle A great for bike cleaning, transporting, lubing or storing Specification: Material: Nylon, steel Color: Black Package Includes: 1 Piece Chain Holder Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different Thanks!