Phoenix 1208.2963 PF147006 Brass Spray Port, Black, Boxed The spray-port is an auxiliary hook-up without storage. The spray-port can also be utilized, with or without a cover, in baggage compartments and/or under the hood of large motorized RV's Cutout dimension: 2-3/4" diameter X 4" diameter Plastic construction 3 inch round Quick connect outlet port only