Item: MR95 CE Ball Bearing Type: Full Ceramic Ball Bearing Cage: PTFE Balls: ZrO2 zirconium oxide ceramic Inner/outer races: ZrO2 (zirconium oxide) Ceramic Dimensions: 5mm x 9mm x 3mm/Metric ID (inner diameter)/Bore: 5mm OD (outer diameter): 9mm Width/Height/thickness: 3mm Size: 5x9x3 mm Quantity: One Bearing