10-Pack Bearings R1038ZZ 3/8" x 5/8" x 5/32" Miniature BearingsR1038ZZ Shielded Ball Bearings 3 8" x 5 8" x 5 32" inch 10 Ball Bearings R1038ZZ Shielded Ball Bearings, measuring 3 8" x 5 8" x 5 32" inch. Made from high strength chrome steel for durability and performance, each Comes with double metal shields (ZZ) to keep out dust and dirt, additionally, these bearings come pre lubricated with grease for smooth operation. R1038ZZ Ball Bearings Deep Groove Ball Bearings Shield Double Metal Shields for dust