QA1 Coil Spring 12-525Available in a chrome plated or silver powder coated finish, QA1's 2. 5'' I. D. Coil Springs are offered in 6'' to 14'' free length. QA1's springs are strong, consistent and have a long life because they are made with the highest quality materials. Made from chrome silicon steel, they are cold wound, heat treated and shot peened. Every spring goes through intensive manufacturing processes to ensure consistency, accuracy and durability. All QA1 springs