Simpsons STWK81700 Walk In Shower Tray Simpsons STWK81700 Walk In Shower Tray - 800 x 1700mm Specification Low Profile - 58mm High High Quality Acrylic Complementary design Easy clean surface Brilliant white finish High Flow Waste Lifetime Guarantee Tray Specification High Flow Waste Simpsons shower trays must only be used in conjunction with the Simpsons High Flow Waste.