SPC Builder Ball Joints provide an excellent alternative to traditional spherical bearings or OE ball joints when constructing custom constrol arms. Designed with the professional/home fabricator in mind, these rebuildable and greasable ball joints offer high load capacity combined with massive articulation. Derived from SPC's latest generation of large truck ball joints, the Builder Ball Joint Series features a wear-compensating design with redundant sealing for years of service between rebuilds. Use the hardened, alloy steel ball stud for Chevy/GMC 1500 HD, 2500, 3500, Avalanche 2500, Suburban 2500, H2, and Ram 1500 (except Mega Cab) models. California Residents WARNING