- Fort Collins, Colorado, United States
- US $950.00
- Jan 30th
12" Reverse Helix Trommel Custom Build This Reverse Helix Trommel is a Custom Build and includes two (2) different 12" barrels. In the event you are not familiar with a Reverse Helix Trommel they work off the Archimedes Screw design where they will take the heavier materials like black sand, dense rocks, garent, gold, silver and platinum and bring them upwards against a slight tilt and water flow and deposit them at the front of the trommel barrel.