ITEM NAME:1 Pair BB Threaded Shaft Press-In Bearing Protection Cover Dustproof 24mm Inner Description: 2 Pieces premium bicycle bike medium shaft bearing protection cover. Waterproof and dustproof Smooth surface, good hand feeling, corrosion-resistant and wear-resistant Without use tools, press manually and install it, it is very convenient, after the crank is locked, there will be no slack. Suitable for crankshaft diameter 24MM. Specification: Material:Plastic Size: Approx.36.8 x 25 x 1.1mm/1.4 x 0.98 x 0.04inch Inner diameter: Approx.24MM Color:Black Package Includes: 2 Piece Protection Cover Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! SKU: FUZ0019891054034285.Waterproof and dustproof. Color may be slightly different since different monitor. 2 Piece Protection Cover. Without use tools, press manually and install it, it is very convenient, after the crank is locked, there will be no slack.