These Associated factory replacement rear shock springs are rated at 3.40 lb/in and are identified by the brown color code for easy tuning reference. The 16mm diameter springs measure 83mm in length with a 10.5-turn coil count and 1.5mm wire diameter. Sold as a pair, they are a direct replacement for hobbyists looking to restore or tune rear suspension on compatible Associated platforms. Features: 3.40 lb/in spring rate 16mm diameter, 83mm length 10.5 turns, 1.5mm wire diameter Brown color-coded for tuning identification Sold as a pair 7/7/26 cs