City/Gravity Water Center w/Brass CV, Key. Lock is "key alike ready" to match your entry door or other compartment locks. Includes installation kit and 3/8" tank vent connection. Dimensions: Cutout Dim: 4-3/4" h x 5-7/8" w, Outside Dim: 6-1/2" h x 7-5/8" w, Collar Depth: 1-1/2", Total Depth: 3-1/4". The product is also IAPMO, NSF, CSA & TEI Certified.