Stainless Steel Ball Bearings with Ceramic Balls, this is a popular size that could be used in many application that uses this size 9mm x 18mm x 4mm. Bearing is made of Stainless Steel, Ceramic Balls are the highest standard of balls that can make your bearings live at least 5 times more than any other bearings.

• Item: Double Shielded Ball Bearings
• Type: Deep groove ball bearings
• Material: Stainless Steel
• Balls: Ceramic Balls
• Closures: Open
• Dimensions: 9*18*4 mm/Metric
• ID (inner diameter)/Bore=9mm
• OD (outer diameter)=18mm
• Width/Height/thickness=4mm
• Size: 9mm x 18mm x 4mm
• Quantity: One Bearing