Designed to fit a 20mm sway bar. Nolathane's sway bar mount bushings not only boasts the latest in bushing material technology but feature a knurled ID/core specifically designed to retain grease. Backed up by a limited lifetime warranty. Nolathane bushings are made from the highest quality elastomers and designed to synchronise your suspension system for optimal safety, handling, performance, ride quality, longevity and reduced maintenance. They are the most positive link between your vehicle's body, springs, struts, arms, bars and shocks.