... price 4. trend to long cooperation A,B series roller chain SPECIFICATION:1)A series chains:a.Simplex:25-1~240-1b.Duplex:25 ... :40-6~240-6g.Octuple:40-8~240-82)B series chains:a.Simplex:04B-1~48B-1b.Duplex:04B-2~48B ... :natural,yellow,blue,black 4)Materiials:carbon steel,stainless steelPACKING: A,B series roller chain