China Good quality ANSI Standard Sprockets Industrial Gear Teeth Rack Bevel Bicycle Stainless Transmission Drive Part Carbon Steel Plate Idler Wheel Roller Chain Sprocket with CE crank and sprocket da ep | Apr 11, 2023 | Product CatalogProduct Description Product DescriptionHeat treatmentHarden teeth, tempering, quechingSurface treatmentzinc plated, blacken, phopharization, carborizedProcessForging( casting)—lathe- teeth shaping—finishing—oil washing—Packing ,made by CNC...