... : 40mn2)pitch : 19.050mm3)plate thickness : 2.42mm4)color : nature,black,blue,yellow5)factory ... series2)motorcycle chains :415,420,428,428H,520,530,630,25,25H3)short pitch conveyor roller chain attachments ... :A-1,A-2.K-1,K-2,SA-1,SA-2,SK-A,SK-24)double pitch ... series, 6)simplex,double,triplex chainsThe chain technic is as bellow1)shot peening2)bluing3 ...