This sturdy galvanized platform serves 2 purposes. It serves as a platform for you to place your heater under and it also helps keep your water clean by keeping the fountain almost 6 in. off the floor, thus allowing less debris to blow in. The hole is off center, hence you would not be able to use the twin duplex fountains. Measures 16 in. x 11 1/2 in. x 5 3/4 in. Use with our #294 heater.