1. Plate: 40Mn A3 steel 2. 30,000km performance 3. OEM service 4. heat treatment 5. four side riveting Yellow Motorcycle Chainwe have the special test machines to make sure the hardness, the fatigue resistance, prestretching. so make sure we can produce the same quality chains according the requirement of our clients.we have our own brand FS, FNT, JC, YL in our domestic market. Our chains are ...