CeramicSpeed Coated 1 3/8″ Spare Bearing for Factor Headsets

The CeramicSpeed Coated 1 3/8" spare bearing for Factor and Cervelo headsets has metal coated races.Specifications: Dimensions (Inner x Outer x Width): 37 mm x 48.9 mm x 6.5 mm Designation: ACB Models: 49 mm:Design: angular contact ball bearing (36 x 45) T