ITEM NAME:40x52x7mm 45 degree x45 degree 2RS P16 Taper ACB Angular Contact Bearing Fo H9X4 40x52x7mm 45 degree x45 degree 2RS P16 Taper ACB Angular Contact Bearing Fo H9X4 Chamfer: 45 degree x45 degree Type: Nylon high speed balls retainer Suitable For: 1-1/2 inch headsets bottom cup oxidation is not easy Bearing frame, wide and thick, high-strength Run of the stick, running faster colour: Photo Color Material: steel size: Outside diameter: 5.2cm Inner diameter: 4cm Thickness: 0.7cm Package Contents: 1 x Bicycle headset bearings Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Chamfer: 45 degree x45 degree. Run of the stick, running faster. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Type: Nylon high speed balls retainer.