The Mansfield 4242ST Bone Shower base Model 7531-BONE is a 42" x 42" Acrylic shower base only. This base is durable and able to withhold the everyday wear and tear due to its acrylic make with fiber glass reinforced bottom. The Mansfield 4242ST Bone Shower base Model 7531-BONE comes with a slopped Center drain for the ease of the water flow to allow it to drain quickly and easily. This product comes with a splash guard to keep the water from leaving the basin, it also has chrome, and polished brass kits that you can also get. The Mansfield 4242ST Bone Shower base Model 7531-BONE comes with the Mansfield limited one year warranty. Mansfield is an American company that has been around since 1929, and has been one of the top producers in design, and quality for the past 80 years. They are the largest domestic producer of sanitary ware, and strive to ensure you get the best products available.