for SpinCo (2 Each) 6301-ZZ, 6301-2Z, 301SS 6301KDD 6300 Series comes in common bore sizes with largerShielded Radial Ball Bearing 12X37X12 Series ball bearings feature honed deep grove raceways that This bearing comes pre-lubricated with grease and is available with metal shields For a precise fit and wise selection. Please confirm your model above before ordering. Double-check dimensions and photos for the right fit. Quality assurance ：Well-designed, excellent processing. Made of highly durable materials, rigorously This is a manufacturer substitution. Functional equivalent to prior parts.Product Description Well-designed, excellent processing.tested, compact & sturdy, longevous. Ultra Durable, Quality Replacement.Made from durable high quality material and well-tested by the manufacturermade from durable high quality material and well-tested by the manufacture