Bike Headsets Bearings Replacement Bike Double Bearing Headsets Duties Bearing Headsets Enduring 52mm 41mm Features: Make of steel materials, antirust, strong and enduring. Use sealing rubber rings, can effectively prevent water and dust from entering. Fine machining ensures smooth surfaces and smooth rotation, fit perfectly with your bike Headsets. Infiltrating silently ,Useful accessory for replacing old Headsets of bike. Suitable for the vast majority of all concealed and half concealed and external bearing Headsets. Specifications: Materials: Steel Diameter: 41mm (1.61inch)/41.8mm (1.64inch)/47mm (1.85inch)/49mm (1.93inch)/52mm (2.05inch) Package Includes: 1pc Bike Headsets Bearings note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. 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.