Coil spring with a 180 lb spring rate. Made with chrome silicon and has a silver powder coat finish. 1-7/8" inner diameter and a 8" length. QA1 now offers 1 7/8" I.D. Coil Springs in 8" and 10" free lengths that are available in a chrome plated or silver powder coated finish. Made to be strong, consistent and have a long life, QA1 springs are made with the best materials possible. All QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions.