Discover with Dr. Cool Replacement Rock Tumbler Barrel for National Geographic Professional Series - 2Lb

I have the grey National Geographic tumbler kit. Came with the small barrel that holds roughly a cup. This one is of the same build and quality. Seems about 3x the size. I don’t think you could go any bigger and still fit on the machine.

Is wider than I thought but great more rocks

Good for small batches

I liked it because it is the same depth but smaller in diameter. I got it to use for stage 3 & 4. For two reasons, this stage of your tumble your rocks are a lot smaller so smaller tumbler means don’t need to put in a lot of filler to get your 2/3 reds full. And it also means the grit from stages 1 & 2 is a lot heavier so for a better finish using a cleaner tumbler that has not been used with these grits. By using the smaller tumbler only for stage 3 & 4 will give a better shine

I got this as a spare for my National Geographic tumbler. It's much smaller than the original, but it still works (although it spins at a faster rate due to the smaller size). It's really sturdy and I'm very pleased with it. It's handy for smaller batches.