Description: Single-row 608ZZ bearing for supporting radial loads. Shields on both sides of the bearing to keep lubricant in and contaminants out. Carbon steel for durability and resistance to deformity under heavy loads. Ultra-Fast Lube for Guaranteed High Speeds and minimal friction. Dimensions suitable for use in such applications as skateboards, inline skates, and scooters Specification: Inner Diameter:8mm Outer Diameter:22mm Thicken:7mm Package Includes: 16 Pcs 608 ZZ Skateboard Bearings