Schluter Systems Kerdi-Drain-A Grey Square Shower DrainThe Kerdi Drain adaptor kit is used to convert a traditional clamping ring drain to an integrated bonding flange drain. The stainless steel adaptor ring replaces the clamping ring in the existing drain to allow connection of the bonding flange. The adaptor kit can be used with the Kerdi Shower T TS TT shower trays or a mortar bed application. The adaptor kit is to be used with Kerdi Drain grates which are sold separate. ABS Adaptor flange 5 1 4 In