Add to Cart Compare Thumler AR-12 Single 12-Lb Barrel Rotary Tumbler MSRP: Now: $189.95 Was: This model is a single 12-Lb barrel with a drive motor. Produces lots of highly-polished rocks, and a favorite of higher-volume customers. Nice large barrel is convenient for larger slabs, preforms and baroque rocks. Get ready to... MSRP: Now: $189.95 Was: Add to Cart Compare