Gold Cube Trommel. The Gold Cube Trommel is "Shovel Ready" and goes anywhere and won't talk back. A dependable machine that can outlast you (bring friends)! Just try to wear out our trommel and reap the rewards. Features: • 5 inch (127mm) diameter trommel with a 16 inch (406mm) long barrel and a 3/16 inch (~4.5mm) classifying screen. Get Quote