Shimano BB-MT500 BB-MT501 68/73mm Fit Hollowtech II Threaded Bottom Bracket BB52

Feature: • Genuine Shimano HollowTech II bottom bracket assembly• Set includes left and right hand cups, spacers, inner cover, and inner O-rings• Sealed cups keep out dirt and water• Maintenance free• Compatible with 68 mm and 73 mm shell ***These are OEM Shimano Parts, Brand new, Never Installed on Bike, Never used in any way, just NOT in retail packaging.***