Product Description
That is standard chain for B series with duplex.
The majoy materials of Standard Chain are 
We have several rows chains for your needs.
Twin track is a professional producer of roller chain. There are two main groups: Stainless steel chain and carbon metal chain.
We have established a nationwide sales net work and the duplex chain china products have already been sold to the countries and regions in European countries and America, Central and Southern Africa along with South-east Asia, which are quite popular among customers.
