Item Type: Master Chain Link_x000D_ Model: 420 1 cl_x000D_ Material: 40Mn 1Reliable Works: Can prevent hot cracking caused by intense heating and cooling under cold weather and speed riding. 2Better Fitting: The 420 roller chain connector allows for broad application on 50cc 70cc 90cc 110cc 125cc 212cc Dirt Bike Pit ATV, etc. 320Pcs in Total: There are 20pcs bike chain link in the set, making the replacement of old and damaged parts easier. 4Great Material: Using premium 40Mn material, not likely to deform, also has excellent durability for repeated using. 5Easy to Install: Designed to have a compact size and a light weight as well, the installation is very easy to finish.Please please check the width and model of bike speed chain before purchase. 20 x Master Chain Link 1 x Storage Box