Roller Chain, Sprocket, Pulley manufacturer / supplier in China, offering Top-Grade Wear-Resistant High-Torque Smooth-Operating Power Transmission Precise Short Pitch Nickel & Zinc Plated Driving Roller Chain with Durable Attachments, Long-Lasting Durable High-Precision Power Transmission Short Pitch Nickel & Zinc Plated Driving Roller Chain (04-48) (A B Series) with Heavy-Duty Attachments, High-Performance Sturdy Corrosion-Resistant Power Transmission Precise Short Pitch Nickel & Zinc Plated Driving Roller Chain (A B Series) with Attachments and so on.