The Elizabethan Classics free-standing brace ring kit is used if your order the Elizabethan classics Free-standing Supply Lines or the Strom Plumbing Free-standing Supply Lines and you do not have a wall directly behind your supply lines to attach the wall supports. Fits drains with a 1 1/2" O.D. See the following drains: ECLTD, ECLTD03, and AB5710 Click here for a schematic for this kit (requires Adobe Acrobat Reader)