Rush Abec 5 bearings are pre-lubricated for a smooth roll out of the box. Featuring removable rubber shields for servicing. These bearings are titanium coated. The exceptional anti-corrosive and anti-rust properties of titanium make it perfect for bearings, as it can be exposed to water for long periods of time without rusting, even more so than stainless steel. Includes 8 bearings with 4 spacers.