Full Ceramic (Zirconium Oxide) 16004 Ball Bearings, the inner diameter is 20, outer diameter is 42 and the width is 8, this is a popular size that could be used in many applications, Bearing is made of Ceramic.

• Item: 16004 Ball bearings
• Type: Full Ceramic
• Balls: ZrO2 (Zirconium Oxide) Ceramic
• Cage: PTFE
• Dimensions: 20*42*8 mm/Metric
• ID (inner diameter)/Bore=20mm
• OD (outer diameter)=42mm
• Width/Height/thickness=8mm
• Inner/outer races: ZrO2 (Zirconium Oxide) Ceramic
• Size: 20mm x 42mm x 8mm
• Quantity: One ball bearing
• Highest Temperature: 356 F (degrees fahrenheit) = 180 C (degrees Celsius)