The media in the cabinet is pulverized glass beads, 100-150 grit. The part number is 3386K73 from [https://www.mcmaster.com/catalog/125/2771 McMaster-Carr] | The media in the cabinet is pulverized glass beads, 100-150 grit. The part number is 3386K73 from [https://www.mcmaster.com/catalog/125/2771 McMaster-Carr] |