These Associated factory replacement 13mm front shock springs are rated at 3.8 lb/in and identified by their yellow color coding for quick tuning reference. Specified at 44mm length, 6.5 turns, and 1.2mm wire diameter, they give RC hobbyists the precise data needed to dial in suspension setup. Sold as a pair, they are designed for Associated RC-10 B-series 2WD buggy platforms. Features: 3.8 lb/in spring rate 13mm diameter, 44mm length 6.5 turns, 1.2mm wire diameter Yellow color coded for easy identification Sold as a pair 7/7/26 cs