AnonymousAir pump 5V - 12VComplies with the description. Still need to install the pumps, but they work properly (even at 3 volts)
Anonymous5V / 12V Waterpump 240L/HWorks perfectly on 12 volts, I couldn't get it to work with 5 volts. The packaging also only says 12 volts, so that may be an error in the description. A good service!