uxcell Aquarium Plastic 3 Way Airline Air Valve Tubing Connector Clear 7mm Dia 6pcs Product Name : Aquarium Air Valve;Connector Outside Dia. : 7mm/0.28" Connector Inner Dia. : 5mm/0.20";Overall Size(Approx) : 48 x 35mm / 1.89" x 1.38"(L*W) Material : Plastic Color : Clear Package : 6pcs x Aquarium Air Valves