Eshopps PF300 Overflow Box for Aquariums, up to 75-Gallons;

Advanced U-tube style compact overflow boxes are designed to fit between your tank and your wall to maximize space usage in your aquarium setup. With only 3 in. required between your tank and your wall, these boxes are excellent for optimizing space. Each box includes everything required to attach it to your system and comes with a foam prefilter. It's always a good idea to achieve greater volume in your aquarium; do it the easy way with one of these overflow boxes. Each unit includes a U-tube tube, cylinder foam, nylon screw wing nuts, black pre-filter box 1 in. bulkhead. Click here for directions on how to install your overflow system .