A series: 08A,10A,12A,16A,20A,24A etc.& douplex and ... and nonstandard chains.majior product is :A and B series roller chain,straight side roller chain,H series of roller chain, motocycle chain ,other roller chain .Zinc-plated,Nickel-plated,Docromet ... of ANSI,ISO,DIN,BSetc.Quality can be guaranteed! industrial roller chain