SR3ZZ Stainless Steel Premium ABEC-5 Ball Bearing with Si3N4 Ceramic Balls (Silicon Nitride), 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 bearings, with Premium ABEC-5 quality.

• Item: SR3ZZ Ball Bearing
• Type: Deep Groove Ball Bearing
• Dimensions: 3/16" x 1/2" x 0.196" inch
• ID (inner diameter)/Bore: 3/16" inch
• OD (outer diameter): 1/2" inch
• Width/Height/thickness: 0.196" inch
• Lubrication: Dry
• Closures: 2 Metal Shields
• Material: Stainless Steel
• Balls: Si3N4 Ceramic Balls (Silicon Nitride)
• Quantity: One Bearing