Equipped with a 1/2 inch Expansion Pex-A inlet and 1/4 inch OD compression outlet connections ( Expansion Tool is needed for installation). the Snap-on faceplate dimensions are 6-1/2 inch x 5 inch. the rough Opening is 5 inch x 3-1/2 inch x 2-3/4 inch. the box with -piece box-and-flange design. No additional support framing required. Pre-installed 1/4 turn Lead Free-free brass valve with stainless hammer Arrestor. complies with NSF 61-G Requirements(Portable Water Standard) Equipped with a 1/2 inch Expansion Pex-A inlet and 1/4 inch OD compression outlet connections.( Expansion Tool is needed for installation) Pre-installed 1/4 turn lead-free brass valve with copper hammer Arrestor, Complies with NSF 61-G Requirements(Portable Water Standard) The Snap-on faceplate dimensions are 6-1/2 inch x 5 inch The rough Opening is 5 inch x 3-1/2 inch x 2-3/4 inch; The box with -piece box-and-flange design, no additional support framing required. This Product is with Expanding Fitting System, NOT with Stainless Steel Clamp & Copper Crimp Ring Systems