Schluter® KERDI-DRAIN-A 5-1/2" Adaptor Kit with 4" Stainless Steel GrateIf you already have a clamping ring drain installed and want to add Schluter's waterproofing system, this adaptor kit is exactly what you need no ripping out the drain, no starting over. The KERDI DRAIN A flange integrates directly with your existing drain body, giving you the KERDI fabric bonding flange that makes the whole waterproofing system work. The stainless steel grate finishes it off with a clean look that won't rust or stain in a wet shower