Stainless Steel Ball Bearing with Ceramic Balls Premium ABEC-7 quality, Bearing is made of Stainless Steel, 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 bearing.

• Item: 4 x 8 x 3 Ball Bearing
• Type: Deep Groove Ball Bearing
• Quality: Premium ABEC-7
• Material: Stainless Steel
• Closures: 2 Metal Shields
• Balls: Si3N4 Ceramic Balls (Silicon Nitride)
• Dimensions: 4mm x 8mm x 3mm/Metric
• ID (inner diameter)/Bore: 4mm
• OD (outer diameter): 8mm
• Width/Height/thickness: 3mm
• Size: 4 x 8 x 3 mm
• Quantity: One Bearing