5 x 10 x 4 mm Stainless Steel Premium ABEC-5 Ball Bearing, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, Ceramic Balls are the highest standard of balls that can make your bearings live at least 5 times more than any other bearings.

• Item: 5 x 10 x 4 Ball Bearing
• Type: Deep Groove Ball Bearing
• Quality: Premium ABEC-5
• Material: Stainless Steel
• Closures: 2 Metal Shields
• Lubrication:Self Lubricated withGrease
• Balls: Si3N4 Ceramic Balls (Silicon Nitride)
• Dimensions: 5mm x 10mm x 4mm/Metric
• ID (inner diameter)/Bore: 5mm
• OD (outer diameter): 10mm
• Width/Height/thickness: 4mm
• Size: 5 x 10 x 4 mm
• Quantity: One Bearing