20-Pack Full Ceramic Miniature 684 Si3N4 Miniature Ball Bearings 4x9x4mm

Wholesale 684 Full Ceramic Ball Bearing, measures an inner diameter of 4mm, outer diameter is 9mm and the width is 4mm.

• 684 Ball Bearing
• Type:Full Ceramic Ball Bearing
• Brand: VXB
• Cage Material: PTFE (Polytetrafluoroethylene)
• Balls: Si3N4 Ceramic
• Inner/outer races: Si3N4 Ceramic
• Dimensions: 4mmx9mmx4mm
• Inner Diameter: 4mm
• Outer Diameter: 9mm
• Width: 4mm
• Quantity: 20 Bearings