SchluterÂ-KERDI-SHOWER-LT/-LTS are prefabricated expanded polystyrene sloped trays with integrated KERDI waterproofing specifically designed to accept the KERDI-LINE linear drain. The trays are available for wall (-LS) or center (-L) drain placement and are available in 39″ x 39″ (100 x 100 cm), 55″ x 55″ (140 x 140 cm), 48″ x 48″ (122 cm x 122 cm), 36″ x 72″ (91 cm x 183 cm), 38″ x 76″ (97 cm x 193 cm) sizes. The KERDI-SHOWER-LT/-LTS are available with center (-LT) and perimeter (-LTS) drain placements in nine configurations with reduced perimeter heights to aide in the installation of curbless showers.