This is a home made case tumbler. I've had 100 30-06 cases in it and it polished them beautfilly. It is very effective and I've found with the right media (corn cob) and a small amount of car polish makes brass look like new.
It also has a port on top I use for annealing brass. I pop a cartridge in, heat it until it turns the right colour, and remove with a glove. It rotates the cartridge so the heat is even all over.
It weighs a lot so pickup only I'm afraid. I'm near Kenninghall, Norfolk
free to collect