Great Dane excavating co.

[Supermario]

No problem. That is one of many voltage ranges they offer. The one I use is 5-16V. 200W.

I like my conveyor speed but if I was gonna be anal about it, I'd probably go with something in the 50-75 rpm range and use the regulator to set it where you need for different materials.
I'm sure mine are too slow for a coarse material like small stone or pebble. They'd probably just roll back. It would be nice to have more speed range to work with.