[Presenting the Best]steel bearing offers distinguished smoothness to your paddling. Being 58% lighter and 120% harder, the pulley creamy chain rotation with notably less friction and noise.[Oversized Pulley]14&16-Tooth oversized design with wide and narrow tooth shapes. Offering precision in chain engagement, performance and significantly reduced friction.[Derailleur Compatibility] Fits For GX AXS eagle12 with the least drag ever.[Longer and Further]Boasting durability and the greatest , TRiPEAK steel bearing pulleys are designed to maintain performance across lifetime.[Off Road, Of Course]Waterproof, dustproof, and anti-deformation. Runs on perfectly sealed bearings, keeping the gunk out and your riding experiences intact.Material: plastic+metalcolour: blackPackage Contents:2 x guide wheel with positive and negative teeth (14T+16T)4 x washer1 x wrenchOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.