These Xray rubber shims are designed to seat between the shock body and aluminum cap, cushioning the cap interface and helping maintain a consistent seal. Sold as a set of 4, they are a factory replacement for the XB2 and XB4 platform shock assemblies. Replacing worn or damaged shims helps prevent oil leaks and reduces wear on the aluminum cap threads over time. Features: Rubber construction for cushioning at the shock cap interface Designed for use with aluminum shock caps Set of 4 shims Xray factory replacement part 7/7/26 cs