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