DreamLine SHTR-1136480-00 36 by 48 Single Threshold Shower Base Product type: shower base. Color: white. High quality scratch and stain resistant acrylic Slip-resistant textured floor for safe bathing. Integrated tile flanges for easy installation and waterproofing Fiberglass reinforcement for durability. Raised edge to prevent water leakage over the threshold Base opening ready for a standard compression fitting drain (drain not included). Optional Acrylic/ABS Backwalls (QWALL-3 or QWALL-5)