uxcell Rubber Flexible Aquarium Air Curtain Bubble Diffuser Tubing, 0.75m, Black Aquarium Air Curtain Bubble; Material : Rubber Pipe Diameter(Approx.) : 9mm/0.35"; Pipe Length : 75cm/29.5" Inlet Connector Inner Dia. : 2.4mm/0.09"; Inlet Connector Outside Dia. : 4.8mm/0.19" Color : Black; Net Weight : 97g 1 x Air Curtain Bubble