A mini version of Renthal's 520 R1 chain for today's high-powered mini racing machines, Shot-peened alloy steel side plates, Ultra-high 4,609 lb. average tensile strength, Chromised bearing pins resist wear, Pre-formed bushings distribute power loads evenly for greater chain life, Gold-colored side plates; copper-colored rollers, The perfect match for Renthal sprockets, Clip type link included