10-Pack Bearings R3ZZ 3/16" x 1/2" x 0.196" - MiniatureR3ZZ Shielded Ball Bearings Lot of 10 3 16" x 1 2" x 0. 196" Double Metal Shields This 10 pack of R3ZZ deep groove ball bearings is perfect for small machinery, hobby applications, and precision instruments. Each bearing features double metal shields to block out dirt and comes pre lubricated for smooth, long lasting operation. Includes 10 bearings per lot Inner diameter: 3 16 inch Outer diameter: 1 2 inch Width: 0. 196 inch Deep groove design for