That is standard chain for B series with duplex.
The majoy material of Standard Chain are SUS304, SUS310, SUS316. They possess the features of high strength, high wear level of resistance and long life.
We have several rows chains for your needs.
Twin track is a professional producer of roller chain. There are two main categories: Stainless steel chain and carbon steel chain.
We’ve established a duplex chain china nationwide product sales net work and the products have already been sold to the countries and regions in Europe and America, Central and Southern Africa and also South-east Asia, which are quite popular among customers.