Chain 25H-130 (Part #10032) Fits Burromax TT250 and TT350R electric mini bike. It will also work with all Burromax 250watt, 350watt and 500watt motors. Chain includes master link. Masterlink is pre-installed on the chain. This chain is heavy duty, has a 1/4" center to center spacing between each link pin, an 1/8" spacing between inner plates, and is approximately 1/4" wide. This chain has 130 links.