High Quality: Made of premium aluminum alloy, it is anti-rust, anti-wear, and has excellent durability.
Easy to Install: Easy and simple to install, can keep the 428 chain work stably and well.
Apply to: Universally suitable for 250cc Pit Trail Dirt Bike Motorcross.
Stable quality: Stable characteristics, excellent performance, and great reliability.
Perfect in workmanship: Professional manufacturing, exquisite workmanship, long service life. Product Description
Features: 
Made of premium aluminum alloy, it is anti-rust, anti-wear, and has excellent durability. Professional manufacturing, exquisite workmanship, long service life. Easy and simple to install, can keep the 428 chain work stably and well. Stable characteristics, excellent performance, and great reliability. Universally suitable for 250cc Pit Trail Dirt Bike Motorcross.
Specification:
Condition: Brand New
Material: Aluminum alloy 
Color: As picture shown
Teeth: 48T
Chain: 428 chain
Distance Between the Nearest Mounting Hole: Approx. 64.22mm/2.53in
Distance Between the Cross Mounting Holes: Approx. 89.7mm/3.53in
Sprocket Diameter:  Approx. 200mm/7.9in
Center Hole Diameter:  Approx. 76.52mm/3.01in
Application: Suitable for 250cc Pit Trail Dirt Bike Motorcross
Package List:
1 x Rear Sprocket Cog
Note:
Please allow 0-1 inch error due to manual measurement, thanks for your understanding.