6004 Full Complement Ceramic Zirconium Oxide Ball Bearing, the inner diameter is 20mm, outer diameter is 42mm and the width is 12mm, Bearing is made of Ceramic.

• Item: 6004 Ball Bearing
• Type: Full Complement Ceramic Ball Bearing
• Cage: No Cage
• Balls: ZrO2 (Zirconium Oxide) Ceramic
• Inner/outer races: ZrO2 (Zirconium Oxide) Ceramic
• Dimensions: 20mm x 42mm x 12mm/Metric
• ID (inner diameter)/Bore: 20mm
• OD (outer diameter): 42mm
• Width/Height/thickness: 12mm
• Size: 20 x 42 x 12 mm
• Quantity: One Bearing
• Highest Temperature: 356 (degrees fahrenheit) = 180 (degrees Celsius)