R1-5ZZS Shielded Miniature Bearing 3/32" x 5/16" x 9/64"R1 5ZZS Shielded Ball Bearing 3 32" x 5 16" x 9 64" One Bearing R1 5ZZS Shielded Ball Bearing, measures an inner diameter of 3 32", outer diameter is 5 16" and the width is 9 64", a standard bearing size commonly used in a variety of industrial and commercial applications, bearing have 2 metal shields to protect the bearing from dust or any possible contamination, plus its pre lubricated with grease so its ready to roll right away. R1 5 ZZS Ball