Xim 2Pcs Bicycle Bottom Bracket M12 Crankset Screw Road Bike Crankset Crank Arm Fixing Bolts Bike Screws Black

M12 sealed bottom bracket screw can effectively avoid the impact of external sand and soil on the bottom bracket and reduce the service life Stable Construct--High quality aluminum alloy high hardness wear corrosion anti-rust. Long Service Life--Finely crafted colorful light weight. Smooth surface waterproof and dustproof no fading and durable in using. High Quality-- workmanship smooth surface small dimensional error and good compatibility with other parts Increase service life and reduces friction and noise Colour:Black Material:Aluminum alloy Size:24.4x20.53mm Package Contents: 2 * Bottom Bracket Screw