SR1212ZZ Shielded Ball Bearings Stainless Steel 1/2" x 3/4" x 5/32" inch Lot of 10 Bearings SR1212ZZ Shielded Stainless Steel Ball Bearings, the inner diameter is 1/2", outer diameter is 3/4" and the width is 5/32", this is a popular size that could be used in many applications, Bearings are made of Stainless Steel each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease, Bearings are packed 10 bearings in one plastic tube.