Swanstone SS-4242-137 Single Threshold Shower Floor, 42"D x 42"W - Bright White. The SS-4242-137 is a genuine product manufactured by The Swanstone Corporation and has a Bright White color/finish. This particular product is a Single Threshold Shower Floor that features a center drain. A slip resistant "pebbled" design pattern is molded into the shower floor for added safety. Also includes a Fit Flo shower drain which is already molded into the floor. It features a solid surface which will not mildew or mold. Dimensions: 42 inches wide by 42 inches deep, with a 4-1/2 inch height.