That is standard chain for B series with duplex.
The majoy materials of Standard Chain are SUS304, SUS310, SUS316. They have the features of high power, high wear duplex chain china 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 steel chain and carbon steel chain.
We have established a nationwide sales net function and the products have already been sold to the countries and areas in European countries and America, Central and South Africa in addition to South-east Asia, which are quite popular among customers.