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R4RSZ Miniature Ball Bearing 1/4" x 5/8" x 0.196" Z-RS Outer Diameter - 85mm PNA17/35 Bore Needle Bearing withR4RSZ Miniature Ball Bearing 1 4" x 3 4" x 9 32" Z RS Hybrid Shield 1 Piece The R4RSZ is a deep groove miniature ball bearing with a unique dual shield setup: one side features a metal shield (Z) for durability, while the other side has a rubber seal (RS) for added protection against dust and debris. Ideal for small tools, devices, and low friction mechanical systems. Size: 1 4" (ID) x 3 4" (OD) x 9 32" (Width) Material: Chrome steel for strength and