Personally, I cannot recommend these to anyone. I've been through 2 x 750 and 4 x 1050, and they don't work as intended on a wavemaker.
When they first came out, there was a "recall" in a sort, and they were sending out replacement pieces so the shaft couldn't slip back into the housing, which would allow the pump to start up backwards and never correct itself. I received 4 of these, and put them on my 750s and 1050s. The pumps continued to start backwards constantly, and a lot of times wouldn't even start all all since they would get caught on the rubber stopper. .