Reliance R4236CD-W Shower Base with Center Drain, 42-Inch by 36-Inch, White, White 42" x 36" 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