6001 Full Ceramic Silicon Carbide Bearing 12x28x8mm Inner Diameter - 1 7/8 inch (1.875") the 6911 outer diameter is

the 6911 outer diameter is 80mm

the 60002NKE9C3TSXM outer diameter is 26mm

NJ321 width is 49mm

Yokomo GT-4 Bearings

6001 Full Ceramic Silicon Carbide Bearing 12x28x8mm Inner Diameter - 1 7/8 inch (1.875") the 6911 outer diameter is6001 Full Ceramic Ball Bearing Silicon Carbide 6001 Full Ceramic Ball Bearing, measures an inner diameter of 12mm, outer diameter is 28mm and the width is 8mm, Bearing is made from Ceramic. 6001 Ball Bearing Full Ceramic Ball Bearing Inner outer races: SiC Ceramic Balls: SiC Ceramic Cage Material: PTFE (Polytetrafluoroethylene) Dimensions: 12mm x 28mm x 8mm Metric ID (inner diameter) Bore: 12mm OD (outer diameter): 28mm Width: 8mm Size: 12 x 28 x 8 mm