Heavy Duty Roller Chain 40-1 x 100 FT 12 inch chain, Roller Diameter: 0.312", Pin Diameter: 0.156"; Pin Length (L max) 0.654" (Lc Max) 0.701", Inner Plate Depth: 0.472", Plate Thickness: 0.059"; Average Tensile Strength: 4000 lb; Material: Carbon Steel; Weight Per Foot: 0.