KomeStone Replacement Rubber Barrel for K4 Rock Tumbler – 3.5 lbs Capacity, Leak-Proof, Quiet Rubber Drum, Upgraded Easy-Open Knob

PERFECT FIT FOR KOMESTONE K4 ROCK TUMBLER: Designed for the KomeStone K4 dual-barrel tumbler, this rubber barrel offers a perfect fit and smooth rotation for both coarse and fine polishing.

3.5 LBS PER BARREL – TUMBLE MORE IN PARALLEL: Each barrel holds up to 5 lbs including rocks, water, grit, and media—allowing 7 lbs total capacity for batch processing.

UPGRADED EASY-OPEN KNOB: Now with an 8-thread twist knob for easier and safer opening—more convenient than standard round designs.

HEAVY-DUTY RUBBER FOR QUIET OPERATION: Crafted from premium tire-grade rubber to reduce noise and endure extended tumbling cycles indoors or in garages.

HASSLE-FREE WARRANTY & SUPPORT: Comes with a 90-day money-back guarantee and 1-year warranty. Reach out to our U.S.-based team for fast replacements or support.