Double Bubble 14mm
The all glass 14mm Double Bubble has two chambers with their own matrix percolator. In the first chamber that your vapour will travel through is a simple single level matrix percolator. After your vapour has traveled through that first percolator it then moves onto the next chamber where it has another more intricate matrix percolator. Both of these chambers combine to create a surprisingly smooth vapour considering the very compact size this bubbler is. It fits extremely well in the hand for effortless use.
The Double bubble 14mm uses, you guess it. A 14mm female joint.