ITEM NAME:2 Pieces 19T Teeth 428 Front Chain Sprocket for GY6 150cc Quad Dirt Bike ATV Description: Teeth: 19T Chain: 428 Chain Material: Metal Brand new and high quality Fits 428 Chain GY6 150cc Quad Bike ATV Go Kart Buggy Specification: Chain Sprocket Size (The long one): Diameter of Disc: Approx. 85 mm / 3.34 inch Diameter of Centre Hole: Approx. 22 mm / 0.87 inch Height: Approx. 70 mm / 2.76 inch Chain Sprocket Size (The short one): Diameter of inner hole: Approx. 20mm/0.78" Package Includes: 2 Pieces 428 19T Front Chain Sprocket Note: 1. Please allow slightly difference due to manual measurement. 2. Color may be slightly different since different monitor. Thanks. SKU: DMO0000049319416435.Fits 428 Chain GY6 150cc Quad Bike ATV Go Kart Buggy. Teeth: 19T. 2 Pieces 428 19T Front Chain Sprocket. Chain: 428 Chain. Chain Sprocket Size (The long one) Chain Sprocket Size (The short one) Height: Approx.