YAJU Fitment for: Universal fit most motorcycles. Fit for 110CC/125CC/140CC ATV. Material: Made of plastic, Iron, is durable and abrasion resistant can use for a long time. Function: Adjust the chain automatically, prevent the chain fall for flabby that improve the safety of driving. Easy Installation: The motorcycle chain tensioner is easy to install, lossless your motorcycle body, circular tube can use a rubber mat reinforcement. Package Include: 1 pcs Motorcycle Chain Tensioner. Features: Universal fit most motorcycle. Easy to install, lossless your motorcycle body. The chain adjusts tool, is durable and abrasion resistant . Adjust the chain automatically, and solve the problem of manual adjustment chain. Avoid relaxation of the chain, improve the safety of driving, and let your driving freely. Specification: Condition: Brand New Material: Plastic, Iron Color: White Total Length: 88mm / 3.46" Installation Hole Inner Diameter: 15mm / 0.59" Thickness: 3mm / 0.12" Two Circles Center Distance: 64mm / 2.52" Spring Inner Diameter: 21mm / 0.83" Roller Inner Diameter: 12mm / 0.47" Roller Outer Diameter: 35mm / 1.38" Roller Height: 26mm / 1.02" Thread Size: M8 x 1.25 Package Included: 1 pcs Motorcycle Chain Tensioner