Dry 608-2rs Sealed Ceramic ZrO2 Ball Bearing 8x22x7mm

608-2RS with ceramic balls, without lubrication, Ceramic is a low friction material that does great without the need of lubrication and the drag that is associated with having grease or oil. 608-2RS fits the 8mm axle skate bearings, bearings work in skateboards, long boards, inline skates, roller blades and roller hockey, double sealed, radial and deep groove ball bearings, 608-2RS bearings are made from high-strength Chrome Steel with ZrO2 Ceramic balls, also know as Zirconia.
Let's talk science it is Zirconium Dioxide or Zirconium oxide. The 2RS suffix means that the bearing are closed with rubber seals to protect the bearing from dust or dirt.

• 608-2RS Ball Bearings
• Deep Groove Radial Ball Bearings
• Material: Chrome Steel
• Balls: Made from Zirconia Ceramic (ZrO₂)
• Closures: Double sealed with NBR rubber Seals
• lubrication: Nope .... just dry
  
• 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
• Quantity: 1 Ball Bearing