Phoenix SA-PORT-BTW Brass Spray Port, Bright White / 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 Dim.: 2-3/4" Dia. x 4" D Plastic construction 3 inch round Quick connect outlet port only