Set of 16 Inline Roller Skate Ball bearings, the set has 16 Ball Bearings with Ceramic Balls, Bearings are Rubber sealed, the cage has silicon nitride Ceramic balls, the 9 balls are made of Ceramic Si3N4 (Silicon Nitride), each bearing has 2 Rubber seals to protect the bearing from dust or any possible contamination, these are self lubricated bearings.

• Item: 608RS Ball Bearings
• Type: Deep Groove Ball Bearings
• Balls: Si3N4 (Silicon Nitride) Ceramic balls
• Closures: Sealed
• Balls Color: Black
• Dimensions: 8mm x 22mm x 7mm/Metric
• Bearing Inner Diameter: 8mm
• Bearing Outer Diameter: 22mm
• Bearing Width: 7mm
• Size: 8 x 22 x 7 mm
• Application: Skating Ball Bearings
• Quantity: Set of 16 Bearings