ITEM NAME:19T Teeth Front Sprocket Cog 428 Chain GY6 125cc 150cc ATV Quad Dirt Bike Description: Teeth: 19t Spline: 24t Chain: 428 Chain Diameter of inlet hole: around 20mm/0.78" Fitment: for 428 Chain Gy6 150cc Quad Bike ATV Go Kart Dune Buggy Package Includes: 1 Piece Front Chain Sprocket Cog Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you. SKU: DMO0000380067005372.Teeth: 19t. 1 Piece Front Chain Sprocket Cog. Chain: 428 Chain. SKU: DMO0000380067005372. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Instruction is not included.