20mm - service kit - suits Whiteline sway bars only, Designed to fit a Whiteline performance 20mm sway bar. Whiteline's sway bar mount bushings not only boasts the latest in bushing material technology but feature a knurled ID specifically designed to retain grease. Whiteline bushings are made from the latest highest quality synthetic elastomer and designed to synchronize your suspension system for optimal safety, handling, performance, ride quality, longevity and reduced maintenance., Limited Lifetime Warranty