6mm ID Non-Flanged Ball Bearing (16mm OD, 4mm Thickness) - 2 Pack

These non-flanged bearings are easy to use while building 'on grid' given they have a 16mm OD.  You can use them as rollers on parts that have a dimension divisible by eight.  The 6mm bore makes them compatible with any component with a 6mm OD (6mm D-Shaft, Round Shaft, Spacers, Standoffs, etc.)