... ,10B,12B,16B,20B,24Betc. &douplex and triplex CL,OL we are one professional chain factory ,producing both standard roller chains and ... :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 ... ANSI,ISO,DIN,BSetc.Quality can be guaranteed! industrial roller chain