1/8" Axle Unflanged Shielded Slot Car Bearings 1/8" x 1/4" x 7/64" inch Lot of 10 Bearings 1/8" Axle Unflanged Shielded Slot Car Bearings, the inner diameter is 1/8", outer diameter is 1/4" and the width is 7/64", this is a popular size that could be used in many applications, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.