Schluter Kerdi Adaptor Drain Oil-Rubbed Bronze-ABS Version Kerdi-DRAIN RES Adaptor Kit ABS 4" Grate EOB Adaptor Kit is used to convert traditional clamping ring drains into integrated bonding flange drain Ideal for when the removal of the clamping ring drain is not practical adaptor/over molded rubber gasket to replace clamping ring - seal to existing drain using KERDI-FIX Features a 4-in square grate in oil-rubbed bronze stainless steel