These high-quality shock springs will allow you to tune your vehicle handling characteristics in seconds.Features:Precision manufactured spring steel for consistent performance and long-lasting durability Specification: 40mm Length 5.6N/mm (32lb/in) Other 40mm Springs in the range: #ARA330599 #ARA330632 Includes:2 x 40mm Shock Spring - 5.6N/mm (32lb/in)