Sram Red AXS eTap Ceramic Pulley Set 12spThe Sram Red AXS eTap Ceramic Pulley Set helps to reduce friction, increase the stiffness, decrease weight, and adds durability to your setup. The grease is optimized to reduce friction and increase longevity. This kit contains a pair of ceramic pulleys, washers, screws, and a grease injector.710845826856