High performance cartridge bearing with 45% greater load capacity than a standard cage separated cartridge bearing . Single row, full complement radial bearing with Grade-25 ball design including rubber dual lip labyrinth seals. 90% filled with the highest quality Rock N Roll grease. Features: 90% filled with Mobilux NGLI 2 synthetic grease, dual-lip labyrinth seals, full complement of bearings, up to 45% increased load capacity