Pro Taper 420 MX Chain (134 Links) (Gold) Designed, tested and produced with the highest level of Pro Taper quality. The gold series chains are purpose built for today's demanding 4-stroke bikes and ATV's. Pro Taper chains are manufactured with lightweight, ultra high-strength chromoly steel alloy for added performance and durability. Premium gold series motocross style chain. Lightweight, ultra high-strength chromoly construction.