The TOTO Unifit 10 Inch Rough-In Outlet Adapter Trapway for Select Toilets allows compatible toilets to be converted from the standard 12-inch to a 10-inch rough-in. The PVC body is equipped with a rubber gasket for the ceramic bowl to connect. The adapter will include hardware to secure tile or wood floors. Wax rings and floor drain bolts must be purchased to complete your installation.