Description:Convenient to install: Easy to install but professional installation is recommended. Chain roller pulley slider complete with duty bearings ready to use.Necessary Function: This chain pulley roller slider is useful and a necessary accessory for motorcycles.Durable Material: Made of durable rubber and metal material, which is waterproof, hard resistant.Universal Fit: The chain roller guide is fit for most dirt pit bikes, street bikes, motorcycles, ATVs, off-road vehicles, etc.Specification:Total Length: 26mm / 1.02"Inner Diameter: 8mm / 0.31"Outside Diameter: 35mm / 1.38"Thread Size: M8 x 1.25Color: BlackMaterial: Rubber, MetalPackage Content:2 pcs x Chain Pulley Roller Slider 2 pcs × Nuts2 pcs × Bolts4 pcs × GasketsNote:Please confirm the size before purchasing.Please allow 0-1 inch error due to manual measurement.