KOHLER K-9193-0 Bellwether 60-Inch x 34-Inch Single-Threshold Shower Base with Left Offset Drain, White Safeguard slip-resistant finish for added safety. Single threshold for alcove installation with three tile-in flanges. KOHLER enameled cast iron. Recessed drain (can be used with K-9157 or K-9159 drain cover). Left offset drain for easy 60" x 30" bath replacement.