BikeMaster 520 Bmzr Z-Ring Chain Features: BikeMaster Bmzr Series Chains are specifically developed for today's extreme high performance sport machines from 1000cc to 1400cc Finest crafted components assisted with special seal ring with factory grease and round rivet head provide superior rigidity High tensile steels used throughout the chain components-larger pins means loads are spread out over wider areas, resulting in longer life and more strength Specifically controlled heat treatment means tougher material and more durability BikeMaster 520 Bmzr chains come a with clip link 525 and 530 Bmzr chain come with a rivet link Made in Japan