These Associated factory replacement 13mm rear shock springs are rated at 2.4 lb/in and feature an L61 length designation with 9.25 turns and 1.2mm wire diameter. The red color coding makes spring rate identification quick and easy when tuning suspension setup. Sold as a pair of metal coil springs made for Associated 1:10 platform vehicles. Features: 2.4 lb/in spring rate 13mm diameter L61 length, 9.25 turns, 1.2mm wire diameter Red color-coded for easy rate identification Sold as a pair 7/7/26 cs