SR2-5 Open Ball Bearings Stainless Steel Lot of 10 Bearings SR2-5 Open Stainless Steel Ball Bearings, this is a popular size that could be used in many application that uses this size 1/8" x 5/16" x 7/64". Bearings are made of Stainless Steel, Bearings are packed 10 bearings in one plastic tube.