Reduces Friction – Poly-vinyl liner allows smooth, friction-free movement between spring leafs to reduce noise and improve ride quality Integrated Retaining Lip – Molded lip design helps keep the liner properly positioned between leafs during suspension movement Universal Width Fitment – Designed for 2-1/4 inch wide leaf springs, making it suitable for a wide range of suspension applications Durable Thin Profile – Less than 1/16 inch thick, providing effective lubrication without affecting spring stack height Generous 20-Foot Length – One continuous roll is enough to line a full cross spring, offering excellent coverage and value Equal partners in a smooth-riding leaf spring suspension are quality shocks and friction-free movement of the spring leafs. This special compound of poly-vinyl plastic has a very "slippery" surface which works as a permanent dry lubricant to eliminate interleaf friction and squeaking. It also features a small lip to keep it in place. One 20 ft. roll does one cross spring. Liner is less than 1/16" thick.