10 Ball Bearings with Ceramic Balls , this is a popular size that could be used in many application that uses this size 3/16" x 3/8" x 1/8", each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, Ceramic Balls are the highest standard of balls that can make your bearings live at least 5 times more than any other bearings

• Item: Hybrid Ceramic Double Shielded Ball Bearings
• Type: Deep groove ball bearings
• Material: Chrome Steel
• Balls: Ceramic
• Closures: Metal Shields
• Lubrication: Self Lubricated (Grease)
• Dimensions: 3/16" x 3/8" x 1/8" English Size
• ID (inner diameter)/Bore=0.187 inch
• OD (outer diameter)= 0.375inch
• Width/Height/thickness= 0.125inch
• Equal: R166-2Z &-R166-ZZ
• Size: 3/16" x 3/8" x 1/8"
• Quantity: 10 Bearings