Rock Shox Rear Shock Air Can Service Kit Has the performance of shock deteriorated? Maybe there is a mysterious air leak or a bit of oil gathering around the bottom? More than likely, it is time to perform some maintenance. The Rock Shox Air Can Service Kit replaces worn out seals within the air can to restore the performance of your Rock Shox. Features Restore your shocks performances Genuine Rock Shox replacement parts | Rockshox | Rear Shock Air Can Service Kit Monarch B1 (Plus, Xx, Rl) C1 (R, Rt3) D1