This is 608-2RS Ball Bearing, each bearing has 2 rubber seals to protect the bearing from dust or any possible contamination, the rubber seals can be removed and re-inserted again after greasing, this is self lubricated bearings (bearing is already lubricated with oil), seals can be easily removed for oiling, and of course can be re-installed again.Bearing material is carbon Steel

• Item: 608-2RS Ball Bearing
• Type: Deep Groove Ball Bearing
• Seals: 2 Rubber Seals, can be removed and re-installed again
• Size: 8mm x 22mm x 7mm
• Quantity: one Bearing
• Other applications: Roller Blade, Inline Skating, glide, roller hockey scooter and Rollerblade
• MARKING: 608RS