This glass percolator fits the Lookah Seahorse Max Dab Pen and the Unicorn Dab Rig. This percolator is made from borosilicate glass: the inner central cone is frosted and has 4 holes. These should be about 1 centimeter below the water level to allow for optimal percolation of the vapor. The vapor will travel up the central shaft inside the frosted inner cone before filtering through the water as it passes through the 4 perc holes.