This Standard Shower Kit is a combination of all the Goof Proof Shower products needed to construct a well prepared shower floor base, in a single box. Same as the SSK-501 Kit with the addition of a clamping style, 3-piece, Square top shower drain assembly. Grate/Strainer is a heavy-duty, chromed brass that resists corrosion.Kit includes:1- PPK-201 Pre-Pitch Kit2- KP-543 Kirb-Perfect sections1- QPK-101 Quick Pitch Kit1- PWP-106 Positive Weep Hole Protector1- SPL/40/30 Pan Liner1- SCB/Drain (Square)· Helps build a properly sloped shower floor base and curb for consistent water drainage· Square Drain and 40mil Vinyl Pan Liner included· All components manufactured of high-impact plastic that are lightweight and non-rotting· Built-in ¼" fall per foot pitch ensures the required slope· Positive Weep Hole Protector prevents drain weep hole blockage· Eliminates the need to gather individual components. Material: Polystyrene.