Product details:

No-hole round overflow faceplate. 2-7/8 in. diameter face with 2-3/4 in. diameter mounting ring. Two (2) 1/4 in.-20 x 3/4 in. pan head screws and mounting adapter bar included. Fits two-hole elbows and integrated overflow tubs. Solid brass construction. Do not use plumber's putty for installation use silicone seal.