The Inland Seas Over the Back Suction/Return provides an easy way to incorporate an intake line and Loc-line style returns into a closed loop system. Comes with 10 ft. of flexible clear 3/4" ID hose and hose clamps (plastic clamps for the 2 inside connections and metal clamps for the two outside connections). The 9" X 5" mounting base has four plastic screws for easy tightening to the back of your tank. Comes with 3/4" Hose Barb connections. Dimensions: 7" X 12.5" X 9". NOTE: THE PUMP IS NOT INCLUDED. IT'S IN THE PICTURE FOR DEMONSTRATION PURPOSES ONLY.