Slimline 42 in. x 42 in. Single Threshold Shower Pan Base in Black with Center DrainThis shower pan base comes in a model size of 42 in. D x 42 in. W x 2 3 4 in. H and features a single threshold design (suitable for 3 wall alcove installation). The drain is located in the center (aligned with the width, as shown in the technical drawing). The base is black in color and can be installed directly onto studs (for unfinished walls, such as those prior to backerboard or cement board). The SlipGrip floor surface is slip resistant for