Clip on base for easy installation and cleaning. Submersible while operating, 12 volt. Maximum head: 2 metres (@ approx 50% output). Looks similar to PU52A. Single 3/4" (19mm) outlet For pleasure craft use only. 12 month warranty. gph = US gallons per hour. Outlet size: for 3/4" (19mm) I.D. hose.