10-Pack Yoyo Bearings 1/4" x 3/8 (.250x.375) inch MiniatureBall Bearings R168 ZZ 1 4" x 3 8" x 1 8" Lot of 10 Bearings High Quality 10 inch size Ball Bearings, measures an inner diameter of 1 4", outer diameter is 3 8" and the width is 1 8", a standard bearing size commonly used in a variety of industrial and commercial applications, each Comes with double metal shields (ZZ) to keep out dust and dirt, additionally, these bearings come pre lubricated with grease for smooth operation. Dimensions: 1 4inch x 3