Hypercoils are recognized world-wide to be the best suspension coils available. They are manufactured from the highest quality chrome steel available in the world. All Hypercoils are powder-coated a navy blue, the mean rate is etched into the end coil and packaged in reusable tubes for convenience and easy identification. Hypercoils are guaranteed for life to the original purchaser with proof of purchase from hypercoil or our authorized dealers/distributors to remain within two percent of the original manufacturing tolerances for rate and free length when properly cared for and used in normal racing conditions. "WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm."