On-car caster adjustable bush, gives +/- 0.33 degrees of adjustment. Suitable for Road and Black Series Applications. Using aBlack 95A durometer ball moulded toan all-new offset stainless steel sleeve andmachined nylon cups,this new and improved design maximises performance and articulation whileretainingthe benefitof on-car adjustability.All come pre-assembled with the ball and cups encapsulated within a plated metal outer shell secured by snap-rings and now include a 27mm spanner for adjustment.