SR2ZZ Stainless Steel Ball Bearing 1/8" x 3/8" x 5/32" inch One Bearing SR2ZZ Stainless Steel Ball Bearing, the inner diameter is 1/8", outer diameter is 3/8" and the width is 5/32", this is a popular size that could be used in many applications, Bearing is made of Stainless Steel each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.