Pondmaster, Pro1000, Waterfall Box, Pumps Up To 950 GPH, Has An 8" Spill, Comes Complete With 1.5" Bulkhead Fitting With 3/4" To 1.5" Barb Adapter, No Media Waterfall Spillway For Greater Aeration, Includes Stepped Barb To Accommodate 3/4", 1", 1-1/4" & 1-1/2", Perfect For Small Backyard Or Preformed Ponds, Measures 12" x 9" x 8".