QA1 11HTBF250 Tapered Pro Coil Spring Silver 11in. 250lbs/in.QA1's Pro Coil Systems use uniquely-wound springs specific to various makes and models. These high travel springs are designed for immediate response, increased stability, and enhanced cornering abilities. Durable silver powder coat finish. FEATURES & BENEFITS Made from high tensile chrome silicon wire Fewer coils means lighter springs with increased travel Silver powder coat Lifetime guarantee to remain with 2% of their original free height Made in the USA FITMENT NOTES Pro Coil Springs are not a direct OE replacement. Only compatible with suggested makes & models which utilize QA1 Pro Coil Systems. Specifications Length: 11in. Rate: 250lbs/in. Finish: Silver Tapered / Straight / Barrel: Tapered Upper Grind: Flat Lower Inside Diameter: 2-1/2in. Upper Iniside Diameter: 4.10in.