61803 Ceramic Bearing 17x26x5 Stainless Steel Open ABEC-3 Bearing Bicycle Hybrid Ceramic Bearing outer diameter is 270mm and

outer diameter is 270mm and the width is 72mm

Bearing is made from Stainless Steel and has Solid Ceramic balls (SI3N4)

N315EG Roller Bearing

B1 = 108mm

61803 Ceramic Bearing 17x26x5 Stainless Steel Open ABEC-3 Bearing Bicycle Hybrid Ceramic Bearing outer diameter is 270mm and61803 ABEC 3 Stainless Steel and Ceramic Balls ball Bearing 17mm x 26mm x 5mm 61803 Stainless Steel Ceramic Balls ABEC 3 quality, inner diameter is 17mm, outer diameter is 26mm and width is 5mm. 61803 Ball Bearing Deep Groove Ball Bearing Cage: Nylon Balls: Ceramic Closures: Open Material: Stainless Steel Lubrication: Pre lubricated with grease Size: 17 x 26 x 5 mm Inner Diameter: 17mm Outer Diameter: 26mm Width: 5mm Equal: 6803 2RS1 Quantity: 1