Bearing Size: 8mm x 22mm x 7mm (608). Nylon Shield - Titanium Ball Bearing. SET OF 16 BEARINGS. Titanium (Symbol: Ti Atomic #22) has a low density and is strong lustrous and corrosion resistant. Titanium is recognized for its high strength-to-weight ratio. Skateboarding is always pushing the limits of the riders and the gear they use. As a direct result of mass bearing blow-outs someone had the idea to create bearings made out of titanium alloy. Titanium is stronger and lighter than steel and it also doesn t rust. These bearings are made with high micro finish grade 10 titanium balls a self lubricating nylon ball retainer and 2 shields to keep out contaminates that are removable for servicing. ITEM SPECIFICS. Item: 16 Titanium Ball Bearings. Size: 608 - 8mm x 22mm x 7mm deep groove raceway ball bearings. Balls: Titanium (Ti). Ball Cage: Nylon high performance ball retainer. Seals: 2 Nylon removeable shields. Inner Diameter: 8mm. Outer Diameter: 22mm. Width: 7mm. Uses: Skateboards Longboards Inline Skates (Rollerblades) Casterboards (Ripstik) and More.