uxcell Fish Tank Air Curtain Bubble Rubber Wall Pump Tube, Black Air Curtain Tube; Material : Rubber Color : Black; Length : 1.25m/4.1ft Tube Diameter : 1cm/0.4"; Valve Hole Dia : 0.2cm/0.08"(Inner Dia),0.35cm/0.14"(Outside Dia) Net Weight : 124g 1 x Air Curtain Tube