uxcell 4.5mm Connector Dia Silver Tone Metal Single One Way Fish Tank Air Valve Product Name : Aquarium Air Valve;Hose Connector Diameter : 4.5mm / 0.18" Male Thred Dia : 5mm/ 0.197";Overall Size(Approx) : 25 x 21 x 8mm / 0.98" x 0.83" x 0.31"(L*W*T) Material : Metal;Color : Silver Tone Weight : 10g Package : 1 x Aquarium Air Valves