ANSI standard short pitch roller chain type: Simplex:25-1.35-1.41-1,40-1,50-1,60-1,80-1,100-1,120-1,140-1,160-1,180-1,200-1,240-1 Duplex : 25-2,35-2,41-2,40-2,50-2,60-2,80-2,100-2,120-2,140-2,160-2,180-2,200-2,240-2 Triplex: 25-3,35-2,40-3,50-3,60-3,80-3,100-3,120-3,140-3,160-3,180-3,200-3,240-3 DIN/ISO standard short pitch roller chain type: Simplex : 04c-1,06c-1,085-1,08a-1,10a-1,12a-1,16a-1,20a-1,24a-1,28a-1,32a-1,36a-1,40a-1,48a-1 Duplex: 04c-2,06c-2,085-2,08a-2,10a-2,12a-2,16a-2,20a-2,24a-2,28a-2,32a-2,36a-2,40a-2,48a-2 Triplex: 04c-3,06c-3,08a-3,10a-3,12a-3,16a-3,20a-3,24a-3,28a-3,32a-3,36a-3,40a-3,48a-3 Material: Alloy--40Mn/A3, 304/316 Stainless steel. Starsand lenght:1.524m/box or 10 feet.. Pitch:6.35-76.2mm Our roller chain Production process: 1. Heat Treatment 2. Carburization 3 Quenching. Parts 4 Tempering 5.Black Oxide/Bluing 6.Shot Blasting 7. Phosphating. 8. nickel Plating. 9.Zinc Plating 10. Apply Oil Packing: Chain+Plastic Bag+ Carton+Wooden case Delivery time: All the standard size within 7 days. custom-made size about 20 days. Service:OEM/ODM Customer have drawing or samples,we also can custom-made them.