Classic 37 in. x 48 in. x 80 in. 1-Piece Low Threshold Shower Stall in White, Grab Bars, LHS Molded Seat, Center DrainNew Construction, Classic Package 48 in. x 37 in. 1 Piece, Low Threshold Shower Stalls with Molded Seat are manufactured in the United States using marine grade, gelcoat and fiberglass polyester resin; which creates a smooth, durable, long lasting surface. 1 Piece Shower Stalls are reinforced with wood paneling which provides flexibility for installing grab bars at any needed height, so you're not dependent on stud locations. The Classic 1 Piece, Low