5 Sets = 40 Skateboard Black Bearings VXB Yellow Seals - Nylon Cage 40 Bearings 40 Skateboard Black Bearings, Bearings are Deep Groove Radial, bearings are blacked, bearings have nylon cage that would make them faster, bearings have 2 Removable yellow Seals, Bearings are made of Chrome Steel, each bearing has 2 Removable yellow Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with oil.