BikeMaster 525 Bmzr Z-Ring Chain Features: BikeMaster 525 Bmzr Series Sealed Chain 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 heads provide superior rigidity High tensile steels are used throughout the chain components - larger pins means loads are spread out over wider area, resulting in longer life and more strength Specifically controlled heat treatment means tougher material and more durability Comes with rivet link Made in Japan