12mm Outer Diameter

6mm Inner Diameter

These quartz beads can hold a lot of heat at 6mm thick. You can heat them inside of your quartz bucket. They come in 2 lengths (12mm and 25mm)

The benefit is more surface area then a solid piece, and heat retention similar to the bottom disc of the Fountain.

Both sizes work in the T6 Fountain.  The 12mm length is great for the T4 Fountains. Some T4 Fountains from 2022 may not properly fit the quartz bead. In that case you may return the bead.

pillar, insert, pill