800-Pack Skateboard/in-line/Skate Bearings Black Shielded dynamic load 267N Each bearing features double rubber

Each bearing features double rubber seals and comes pre-greased for easy

510052 Ball Bearing

Limiting Speed:Grease Lubrication: 11

Dimensions: 25mm x 62mm x 17mm/Metric

it has Ceramic Balls (Si3N4 Silicon Nitride)

800-Pack Skateboard/in-line/Skate Bearings Black Shielded dynamic load 267N Each bearing features double rubber800 Inline Skate Roller Hockey Skateboard Black Color 2 Metal Shields 800 skateboard bearings has 800 Deep Groove Radial Ball Bearings,skateboard bearings are closed with Metal Shields,skateboard bearings are made from high strength Carbon Steel,each skateboard bearings has 2 Metal Shields to protect the rolling elements from dust or any possible contamination,also our skateboard bearings are pre lubricated with oil, our skateboard Bearings set is