10-Pack Bearings R155ZZ 5/32" x 5/16" x 1/8" Miniature BearingsR155ZZ Ball Bearings 5 32" x 5 16" x 1 8" 10 Bearings 10 R155ZZ Shielded Bearings, R155ZZ inner diameter is 5 32", R155ZZ outer diameter is 5 16" and the R155ZZ width is 1 8", R155ZZ is commonly used in industrial, commercial, and mechanical systems, each R155ZZ Comes with double metal shields (ZZ) to keep out dust and dirt, also R155ZZ bearings are pre lubricated with grease. R155ZZ Double Shielded Ball Bearings Deep groove ball bearings Shield