Features: Consist of high strengths aluminum alloys, these 8mm cranks bolt withstands 200kg loads while maintaining light weight design for enhancing bicycles portability. Waterproofed sealing construction effectively block moisture and debris infiltration, features integrated hexes key. For commuters, folded bike enthusiasts, and competitive cyclists pursues durability bottom brackets component for frequent adjustments. Engineered to performs in rain sobby commutes while maintaining corrosions resistance through accuracy machined surfaces treatments. Universals square tapers bottom brackets compatibility ensures integration with major bicycles brand. Specifications: Color:Four Elections Dimension:24.3x16.3x20.7mm/0.95×0.64×0.81in Component:aluminum alloys Package Includes: 2pcs Square hole center shafts cranks note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.