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The LJK 6904 2RS Ball Bearing is a high-quality deep groove bearing designed for efficient and smooth performance in compact spaces. It has a 20 mm inner diameter, 37 mm outer diameter, and 9 mm width, making it ideal for cycles, scooter wheels, electric motors, and machinery.This bearing features double rubber seals (2RS) that prevent dust and moisture from entering, ensuring long-term durability. It is pre-lubricated with high-quality grease, allowing it to run silently and at high speeds. The bearing is made from hardened steel with a rust-resistant finish, making it suitable for both indoor and outdoor use.Whether you’re replacing old cycle hub bearings or assembling an industrial tool, the LJK 6904 2RS offers the perfect combination of precision, strength, and smooth motion