Maverick Glass has created one of the best beaker bongs on the market! These massive 18'' beaker bongs feature a pyramid diffused slit perc in the beaker base! The downstem is fixed and direct injects into the pyramid perc. The joint size is 18mm female and accepts a 18mm male bowl. Stack ice onto the ice pinch for additional cooling! If you love big bongs and clean and smooth smoke, this is the piece for you! 7mm Thick!!