Laticrete Hydro Ban Preformed Bench Features All Laticrete Hydro Ban Preformed benches are 20" (508mm) in height Laticrete Hydro Ban Preformed benches are components of the expanded Laticrete Hydro Ban line of waterproofing products that allow for high-quality rapid shower installations Made from high-density expanded polystyrene with a waterproof finish Hydro Ban Preformed benches are 100% waterproof and ready-to-tile Lightweight and durable, easy to transport, handle, and adjust during installation Factory-installed, code-approved waterproofing meets ANSI A1 118.10 requirements Ready to tile! Multiple design options and sizes are available adding utility and value to the shower installation Component of Laticrete Lifetime Warranty Single source responsibility Works in conjunction with Laticrete tile and stone installation materials Available Sizes 9305-1111-B: 11.5" x 11.5" x 20" Bench 9305-3511-B: 35" x 11.5" x 20" Bench