Features: *1. Made of high quality aluminum alloy, with high strength, firmness and durability. *2. Exquisite and compact, light weight, easy to carry, convenient for bicycle chassis maintenance. *3. Precise and straight tooth provide tight bite, not easy to slip.? *4. The 16-notch suits for the bottom bracket with an outer diameter of 44mm.? Description:? *1. Material: aluminum alloy *2. Type: BB44/BB44+BB46 *3. Color: black (as shown) *4. Dimensions: BB44: 206mm, BB44+BB46: 230mm *5. Thickness: 3mm *6. Weight: about 40g/46g *7. Applicable: BB44- Shimano: BB51/BB52/BB70/BB71/RS 500/MT 500, SRAM GXP series bottom bracket, PROWHEEL Sameng series, IXF series BB44+BB46- SRAM DUB thread bottom bracket, special wrench for new SRAM quick coupling DUB thread bottom bracket? Package Includes:? 1x Bottom Bracket Wrench? Note: *1. All pictures are professionally color-coded, but due to the difference of ambient light and display equipment settings, there may be some deviation between the pictures you see and the objects themselves, please understand. *2. The data is measured manually, and there may be some deviation, but it does not affect the use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.