Bionic Bearings - Bionic ABEC-7 Bearings - 8mm Bearings - 16 Pack - Atom Bionic ABEC 7 Bearing -8mm -16 pack - Designed to be low maintenence, entry level bearing. Factory lubricated with light race oil, no break in period, and delron cage. High performance skate bearings. Titanium ball bearings. Synthetic delrin cages. Non-contact shields. No break in period needed. Lubricated with light race oil.