11 x 21 x 5 Full Ceramic Ball Bearing, the inner diameter is 11mm, outer diameter is 21mm and the width is 5mm, Bearing is made of Ceramic.

• Item: 11 x 21 x 5 Ball Bearing
• Type: Full Ceramic Ball Bearing
• Cage: PTFE
• Balls:Si3N4 Ceramic (Silicon Nitride)
• Inner/outer races: Si3N4 Ceramic (Silicon Nitride)
• Size: 11mm x 21mm x 5mm
• Inner Diameter: 11mm
• Outer Diameter: 21mm
• Width: 5mm
• Quantity: One Bearing