Aqua Pro Colonial White Recessed Mount Flange Fresh Water Inlet 27882 10-0986

It has 1/2 inch FPT inside connection. Cutout is 3-1/2 inch diameter & overall dimensions measure 4-1/2 inch outside diameter. These are made of non-toxic materials, have "poppet" style check valves & 1/2 inch pipe thread. Certified to IAPMO and NSF standards.