Moog CC661 Coil Spring Set Variable rate coil springs maintain proper chassis ride height and smooth ride Ideal for family transportation, work trucks and sales fleet vehicles Powder-coated to protect against corrosion Worn or sagging coil springs can cause premature tire wear due to vehicle misalignment Fits 1991 - 1999 GM vehicles Spring size: Inside Diameter 4.25", Bar Diameter .64", Installed Height 10.5" Load rating: 830 lbs. Square ends All coil springs meet or exceed OEM (original equipment manufacturers) standards