Reliance R4842CD-W Shower Base with Center Drain, 48-Inch by 42-Inch, White, White 48" x 42" single threshold shower base with 3-sided, integral tile flange Textured bottom meets ASTM F-462-1994 slip resistance Textured bottom meets ASTM F-462-1994 slip resistance Durable Lucite high-gloss cross-linked cast acrylic