41/41.8/46.9/52mm Bike Headset Bearings Mountain Bicycle Steel Repair Bearing MTB Cycling PartsSpecification:Body Material: SteelColor: SilverOuter Diameter: 41mm/1.61" 41.8mm/1.65" 46.9mm/1.85" 52mm/2.05"Inner Diameter: 30.15mm/1.19" 30.15mm/1.19" 34.15mm/1.34" 40mm/1.57"Product Height: 6.5mm/0.26" (41mm/41.8mm); 7mm/0.28" (46.9mm/52mm)Net Weight: About 20g(41mm)/22g(41.8mm)/27g(46.9mm)/31g(52mm)Angle: Inner Angle 45° Outer Angle 45°Application: Repair most of the fully concealed, semi-concealed and external bearing Headset on the marketWarm Tip: The ball bearing is not available.Note:1. The color of the Bearings seal ring of different batches may be different, generally black, some are red.2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!3. Please allow 1-3mm measuring deviation due to manual measurement.