R2-6ZZS Miniature Shielded Bearing 1/8" x 3/8" x 9/64"R2 6ZZS Shielded Miniature Bearing 1 8" x 3 8" x 9 64" inch R2 6ZZS Chrome Steel Ball Bearing, measures an inner diameter of 1 8", outer diameter is 3 8" and the width is 9 64", a standard bearing size commonly used in a variety of industrial and commercial applications, 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