ITEM NAME:Modified Siding Oil Saving Fuel Gear for GY6 125cc 150cc Scooter Engine Parts Description: Inner Teeth: 19T Outer Teeth: 40T Diameter: 75mm / 3" Thickness: 20mm / 0.79" Fits for GY6 125cc 150cc Scooter Moped ATV Specification: Material: Metal Package Includes: 1 Piece Final Drive Gear SKU: DMO0000039267010799.Fits for GY6 125cc 150cc Scooter Moped ATV. 1 Piece Final Drive Gear. SKU: DMO0000039267010799. Thickness: 20mm / 0.79".