Bike Square Taper Bottom Bracket Screws Metal Crankset Bolts Cycling and high Features: This screw is specially designed for bottom bracket,which is outer hexagonal type. Please confirm it whether it is suitable for you before order. High intensity,high and Specification: Metal Type: M8x18mm Color: Black Size: Size Thread Length: 18mm(0.71in) Quantity: 2 Pcs(screw only,other accessories in the picture are not included!) Note:1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes(without retail package): 2 x Screw