uxcell Flexible Bubble Wall Air Curtain Tube 75cm Length Black for Aquarium Fish Tank Product Name : Aquarium Air Curtain Bubble;Material : Rubber Pipe Diameter(Approx.) : 1cm / 0.39";Pipe Length : 75cm / 30" Inlet Connector Inner Dia. : 2.5mm / 0.01";Inlet Connector Outside Dia. : 4mm / 0.16" Color : Black;Net Weight : 101g Package Content : 1 x Air Curtain Bubble