All Glass Aquarium AAG29101 Versa Top, 72 by 18-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 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 this item is a set of 3 separate panes of glass. Each Versa-Top features a clear vinyl back strip that can be easily cut to custom fit your accessories