each bearing has 2 Metal Shield to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.
F608ZZ Ball Bearing
Type: Deep Groove Ball Bearing
Size: 8mm x 22mm x 7mm
Bearing Inner Diameter: 8mm
Bearing Width: 7mm
Bearing Outer Diameter: 22mm
Closures: 2 Metal Shield
Package :1pcs