1Pc Crank Bolts Allen for Key Bike Bottom Bracket and high Features: No separate crank needed With drop-resistant paint, seal, not easy to fall out. Application: square hole Size:20.6mm x 23mm(approx) Color:Black+Silver Quantity: 1PC Note: No retail package 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! Package includes: 1PC of Crank Bolts (without retail package)