Bearing 635ZZ 5x19x6mm - Shielded - MiniatureBall Bearing 5x19x6 One Bearing This is commonly used in industrial, commercial, and mechanical systems that uses this size 5mm x 19mm x 6mm. made from durable 52100 alloy steel, commonly known as chrome steel, each Comes with double metal shields (ZZ) to keep out dust and dirt, plus its pre lubricated with grease so its ready to roll right away. Double Shielded Ball Bearings Dimensions: 5*19*6 mm Metric ID (inner diameter) Bore=5mm OD (outer