689 Full Ceramic (Zirconium Oxide) Ball Bearings, the inner diameter is 9mm, outer diameter is 17mm and the width is 5mm, this is a popular size that could be used in many applications, Bearing is made of Ceramic.

• Item: 689 Ball Bearing
• Type: Full Ceramic Ball Bearing
• Cage: PTFE Cage
• Balls: ZrO2 (Zirconium Oxide) Ceramic
• Inner/outer races: ZrO2 (Zirconium Oxide) Ceramic
• Dimensions: 9mm x 17mm x 5mm/Metric
• ID (inner diameter)/Bore: 9mm
• OD (outer diameter): 17mm
• Width/Height/thickness: 5mm
• Size: 9 x 17 x 5 mm
• Quantity: One Bearing
• Highest Temperature: 356 (degrees fahrenheit) = 180 (degrees Celsius)