Discover with Dr. Cool Replacement Rock Tumbler Barrel for National Geographic Professional Series Tumbler and Hobby Series Tumblers, 2 Pound Rock Polisher Barrel with Leak-Proof Lid

exactly as advertised

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.

So glad I found this! It works perfectly with the Nat Geo rock tumbler.

Needed a replacement tumbler for my son's older National Geographic Rock Tumbler Set. I had read in other reviews that this would work, and it DID! So I ordered another to have another barrel on-hand. Very glad I did. Great price, Arrived very quickly. Very pleased with this purchase. Thanks to the other Reviewers who confirmed this tumbler would fit the Nat Geo sets, it fit our perfectly. Happily Recommend!

Very good product, but the metal threaded stud on the lid that the knob screws to, just broke off n started spinning while on the tumbler...wound up causing me to have to cut it open to get my rocks out.!!! The plastic knob wouldn't come off.!!! I gave 4 stars, but would've given 5 if that hadn't happened.!!! Just one that wasn't tack-welded very good.!! Then to compound it, Amazon sent me another for free and it was lost in transit to SC in Concord, NC. They just eventually replaced my money & I bought one to replace it with the credit from Amazon.!!!

Works well as replacement for my National geographic rock tumbler. I use it for milling antique muzzleloading propellant.

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.

Once I have finished steps 1 and 2 with the heavier grits, the rock load is reduced quite a bit so this smaller size is perfect for the polishing stages. It works perfectly on the National Geo tumbler I have and the lid seals great. So far it's held up really well but if it tanks, I'll come back and say so in an update. So far so good.

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

Good for small batches

Is wider than I thought but great more rocks

belle qualité