DreamLine SHBW-1440742-01 QWALL-4 Shower Enclosure Backwalls Kit Product Type: Shower Backwalls Kit Color: White Assembly required Includes 2 glass corner shelves Attractive tile pattern Designed to be installed over existing finished surface (not directly against studs) Unique water tight connection of panels Durable acrylic/ABS construction Trim-to-Size design for shower enclosures w/wall dimensions 30" to 40" from corner. Must be trimmed These acrylic wall systems are specially designed to be installed over existing solid surface not directly against the studs Optional single threshold base available Limited 1 (one) year manufacturer warranty 30 - 40" W x 30 - 40" D x 74" H