The Mansfield 3636TTNA Bone Shower base Model 7509-BONE is a 36?x36? Acrylic shower Triple Threshold 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 3636TTNA Bone Shower base Model 7509-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 3636TTNA Bone Shower base Model 7509-BONE comes with the Mansfield limited 0ne year warranty. Mansfield is an American company that?s 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.