61903-2RS Full Ceramic Ball Bearing, the inner diameter is 17mm, outer diameter is 30mm and the width is 7mm, Bearing is made of ZrO2 Ceramic Zirconium oxide.

• Item: 61903-2RS Ball Bearing
• Type: Full Ceramic Ball Bearing
• Cage: PTFE
• Balls: ZRO2 Ceramic
• Closures: PTFE covers
• Inner/outer races:ZRO2 Ceramic
• Dimensions: 17mm x 30mm x 7mm/Metric
• ID (inner diameter)/Bore: 17mm
• OD (outer diameter): 30mm
• Width/Height/thickness: 7mm
• Size: 17 x 30 x 7 mm
• Quantity: One Bearing