uxcell Single Way Water Air Flow Control Valve 5mm Tube Dia 2pcs for Aquarium Fish Tank Product Name : Aquarium Air Valve;Material : Metal, Plastic Color : Silver Tone;Design : Single Way Outlet Fit Air Tube : 5mm/ 0.2" Net Weight : 14g;Overall Size : 25 x 8 x 22mm / 1" x 0.3" x 0.9"(L*W*H) Package Content : 2 x Aquarium Air Valve