From the Puffco website... "The Peak Pro glass attachment is a hand-blown borosilicate work of art. The glass features water filtration for a smooth hit each time. The attachment easily snaps in and out of the base to make storage and cleaning simple.
*Backwards compatible with the Peak 1 device (won't fit in Peak 1 travel case)."
*Backwards compatible with the Peak 1 device (won't fit in Peak 1 travel case)."