Features: brand new and high quality Package Contents: You will receive 1 pc crank screw bicycle. The size of the aluminum alloy crank bolts 24.3x20.7mm/ 0.96x0.for 81 inch. Meet your daily needs. High Quality Material: The bottom bracket crank screws made of high-quality aluminium alloy material, plastic seal, no separate crank cover required, strong and durable. Features: The crank screw hexagon socket can effectively avoid the influence of external water, sand, mud etc. on the centre axis and increase the service life. Easy to Install: The crank screw hexagon socket is small, sturdy and lightweight, portable and easy to install. Quick assembly in just a few simple steps. Application: The bike square taper bottom bracket crank screw hexagon socket fit for almost bicycle types and suitable for square crank set and bottom bracket. Specifications: Material: Aluminum Alloy Color: Red/Blue/Black/Golden Package Weight: approx.10g Size: approx.24.3x20.7mm/0.96x0.81in (More Size Details, Please See Photo.) Package Includes: 1Pc x Bike Crank Screw note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!