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LJK 6903 2RS 2 pieces set Deep Groove Ball Bearing – 17x30x7 mm – Double Sealed – High-Speed – Rust-Proof for Cycles & MotorsThe LJK 6903 2RS Ball Bearing is a premium quality, compact deep groove ball bearing with double rubber seals for extended life and smooth rotation. Measuring 17x30x7 mm, this bearing is perfect for high-RPM systems such as e-scooters, bicycles, electric motors, and more.The double-sealed (2RS) design ensures dust and moisture resistance, and it comes pre-lubricated for hassle-free installation. Its hardened steel body and anti-corrosion coating make it durable for industrial and everyday applications.Whether you're replacing old bearings or setting up a new mechanism, this bearing ensures long-term performance and quiet operation.