You are buying a lot of 100 Oil Preserved deep Groove Radial Ball Bearings with Light Plastic Cage, they are used in Fidget Spinners, Open Ball Bearing 608 Sale Pack, dimensions are 8mm x 22mm, the (Plastic) Nylon material has low friction and less weight, less friction & less weight means higher speeds. Bearings are made of Chrome Steel,also bearings are Oil preserved, Bearings are packed 8 bearings in one plastic tube.

• Item: 608 Ball Bearings
• Type: Deep groove ball bearings
• Retainer: Plastic (Less friction & less weight = higher speed)
• Quantity: 100 bearings
• Inner Diameter: 8mm
• Outer Diameter: 22mm
• Width: 7mm
• Size: 8 x 22 x 7 mm