Grav Labs STAX Coil Perc Filter Module

Grav Labs STAX Coil Perc Filter Module

This piece features a double spiral perc and adds height to your STAX mix and match tube kit! From Grav Labs in Austin, Texas, the STAX Coil Perc Filter is made of 5mm-thick laboratory-grade borosilicate glass, with a 34mm ground joint at the top and bottom to fit in between STAX bases and mouthpieces, or stacked with more filters! The 34mm joint is grooved on the outside to perfectly hold the 34mm joint clip for a more secure connection.