The Terp Screw by Tokada Madrona is the perfect addition to your terp slurper set up.  Featuring a hand made screw and topper marble, the screw functions as the pillar and valve marble, while the marble sits atop the banger to form a perfect seal encouraging the screw to spin, stirring the concentrate and ensuring efficient vaporization and nucleation.

Length 35mm, 29mm screw