Check the listing for details. FSA Mega Exo Bottom Bracket Bearings Kit MR129 6804). Condition: New. Listed at 17.04 USD. 1 x 6804 LLB 1 x MR129 (6804-19-2RS) Bearing Codes: 6804, MR129 Dimensions: 20mm * 32mm * 7mm & 19mm * 32mm * 7mm Brand: blueseal Bike Bearings & Trailvision ABEC: 3 Grade: 10 Seals: LLB Grease: Mobil XHP 222 & 462 Premium Marine Application: FSA Bottom Brackets Learn more about blueseal Bike Bearings™ Unlike standard bearings, blueseal Bike Bearings™ are engineered for the unique demands of cycling. With an ABEC 3 rating for precision, they feature a complete fill of waterproof grease to protect against moisture and corrosion. Close-contact rubber seals prevent dirt and debris from entering, ensuring durability. Designed to withstand the challenges of varied conditions, blueseal Bearings™ offer reduced maintenance, making them an ideal choice for cyclists on the road or off on the trail.