The Voltaire Single-Threshold Center-Hand Drain Shower base is a stylish addition to any bathroom setting. Its traditional low threshold provides easy access to the shower. The acrylic and fiberglass technology reinforces a durable and safe shower base. This shower base is offered in a variety of colors, giving you the versatility needed to enhance any modern bathroom. Swiss Madison SM-SB510 Features: Low single threshold: shower bases featuring a low single threshold offer consumers versatility, enhanced safety, and superior accessibility Fiberglass reinforced acrylic: provides a low-maintenance option that provides ease of cleaning and durability High-gloss finish: shower bases featuring a high gloss finish offer a sleek appearance, ease of cleaning, and durability Integral 3-side flange to prevent water leakage: shower bases with a three-side flange offers superior waterproofing and structural support Center drain: installation for a center drain location Sold separately: shower drain is not includedSwiss Madison SM-SB510 Specifications: Height: 5-1/2" (top to bottom) Length: 48" (left to right) Width: 36" (back to front) Number of Tile Flanges: 3 flanges Installation Type: Three Wall Alcove Drain Placement: Center Drain Size: 3-3/8" (diameter of drain outlet)