ABI Standard Design Cartridge Bearings. - 90% filled with Mobilux NGLI 2 synthetic grease, dual-lip labyrinth seals - If the bearing you are replacing is not marked with a manufacturer number, measure it and compare to specifications listed SPECIFICATIONS - Thickness: 7 - Material: Steel - Bearing O.D. (mm): 32 - Manufacturer Number: 6804 - Bearing I.D. (mm): 20