fish tank Regulating valve - SODIAL(R) Aquarium Fish Oxygen Air Line Tubing Flow Control Valve 20 Pcs Gray Product Name : Aquarium Air Valve;Hose Connector Diameter : 5mm / 0.2" Overall Size(Approx) : 47 x 23mm / 1.9" x 0.9"(L*W);Material : Plastic Color : Gray Weight : 39g Package : 20x Aquarium Air Valves