They are much better and easier to clean than quartz beads. Their size makes them ideal for Puffco or 20mm nozzles. 25mm or 30mm beads you need 6mm beads.
Pros
High Quality Materials --- Terp Beads are made from high quality Sic materials. Will not crack or break when heated. Excellent heat retention, stops hot spots and burns from constantly moving the oil while you enjoy your time.