Grav Medium Gravitron

This is the smaller version of the large Gravitron, but it still packs the same kind of punch you'd expect from a gravity smoking system. This new and improved version 2.0 Gravitron® boasts a fivefold increase in glass thickness and upgraded platinum cured silicone grommet for a tighter seal. The 14 mm female ground joint now fits any 14 mm male bowl and the flange at the top of the neck makes lifting the bottle a breeze. The Gravitron creates big, efficient hits though gravity and pressure. Start by filling the base halfway with water. Then pack the bowl with dry herb and insert it into th…