[Presenting the Best]steel bearing offers distinguished smoothness to your paddling. Being 58 percent lighter and 120 percent harder, the pulley creamy chain rotation with notably less friction and noise. [Oversized Pulley]14and16-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: plasticandmetal colour: black Package Contents: 2 x guide wheel with positive and negative teeth (14Tand16T) 4 x washer 1 x wrench Only 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store