Linear Shower Base System with Close-to-Wall Drain Placement wedi® Fundo® Linear Shower Modules pair with matching Fundo Linear Shower Extensions to create a shower base with a one-way slope and close-to-wall linear drain placement. Modules and extensions are sold separately and are available in matching 32", 36", 42", 48", and 54" widths. 100% Waterproof Foam Core Construction Both components feature a closed-cell extruded polystyrene foam core covered with fiberglass mesh embedded in a cement resin coating. This construction makes the shower base components 100% waterproof and mold-resistant. Included Linear Drain System Each Fundo Linear Shower Module includes a wedi Fundo Click and Seal® Drain Kit. Fundo Linear Drain Covers are sold separately. Matching shower extensions feature a 2.1% slope toward the linear shower module.