Aqueon Versa-Top Hinged Glass Aquarium Tops (48 Inch) Our glass tops are perfect for reducing evaporation and keeping fish from jumping out of your aquarium Each Versa-Top features a clear vinyl back strip that can be easily cut to custom fit your accessories Special store use Versa-Tops feature heavy 3/16 glass with notched Corners for air lines and larger glass sections that allow easier netting of fish Actual Glass top measures 44.5-Inch X 16.5-Inch designed to fit on top of an aquarium up to 48 X 18 inches