Simmerring and Dust Cap by SKF:- Less friction (approx. -20%) compared to conventional sealing rings- Use of a self-lubricating material- Less stick-slip - (Stick-slip = breakaway force caused by static friction)- Significantly improved sealing effect - Less air entry into the fork- Less dirt entry into the fork - resulting in less wear on bushings and oil - thus maintaining the optimal sliding properties of the fork- Increased long-term sealing performance - Excellent water, dirt, and air tightness. UV resistantFor:- BMW S1000RR 2010-2016- BMW HP4 2013-2016- BMW S1000RR Sport 2015/2016 - BMW RnineTScope of delivery:1 piece sealing ring1 piece dust cap(Two sets are required for a complete fork)