A genuine and original easy to fit RockShox part. The RockShox Rear Shock Air Can Basic Service Kit includes air can seals and a wiper. Designed to fit AM/Monarch B1 (Plus,XX,RL) and C1 (R,RT3) rear shocks.
Best Price: £14.40 from Tweeks Cycles
RockShox AM Rear Shock Air Can Service Kit – Monarch B1 And C1 Reviews