Glass Bead

A glass bead is an extra-small diameter ball with a low density
and low compressive strength. The size is about 149-88
microns. They are able to peen surfaces without damaging the metal. Under normal conditions,
glass beads can be recycled thirty times. The most commonly used glass bead size is the MILPRF-9954B No. 8 glass bead. This specification was approved on September 26, 2005 by the
Department of Defense.