Enduro 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
• Bearing O.D. (mm): 37
• Bearing I.D. (mm): 20
• Manufacturer Number: 6904
• Material: Steel
• Thickness: 9