This titanium version of the Pulley Wheels for SRAM AXS, 12s NW offers an ultra long life due to the extreme durability of titanium and coated bearings. The precision machined titanium symmetrical narrow-wide profile ensures stable chain retention, crisp shifting, and is highly efficient. CeramicSpeed Pulley Wheels for SRAM 11s, 12-tooth is developed, designed and handbuilt in Denmark and comes with seperate dust covers to fit SRAM Red AXS and SRAM Force AXSIn the box:-Two 12-tooth pulley wheels-Alloy Spacer Kit-CeramicSpeed Bearing Oil, 15ml. bottle-Sticker Sheet