That is standard chain for B series with duplex.
The majoy material of Standard Chain are SUS304, SUS310, SUS316. They possess the characteristics of high strength, high wear resistance and long life.
We have several rows chains to your requirements.
Twin track is a professional manufacturer of roller chain. There are two main classes: duplex chain china Stainless steel chain and carbon metal chain.
We have established a nationwide sales net work and the products have already been sold to the countries and areas in Europe and America, Central and South Africa along with South-east Asia, which are very popular among customers.