Uxcell 5mm Connector Dia Silver Tone Metal Single One Way Aquarium Air Valve Product Name: Aquarium Air Valve; Hose Connector Diameter: 3.5mm / 0.14" Overall Size(Approx): 30 x 21 x 8mm / 1.18" x 0.83" x 0.31"(LWT);Material: Metal Color: Silver Tone Weight: 30g Package: 4 x Aquarium Air Valves