A friend of mine and his son bought 6 of these pumps from a guy who said he purchases these out of Europe and brings a container full of pumps, signs, and other stuff every so often. There are several models of these twin visibles. The MIS (sorry if its not spelled correctly) is also another pump company. If you look close on a SATAM, you should see a devil on a couple of places on the pump. There is even a model that bolts on to a wall. I think these are really cool pumps.