uxcell Rubber Coated Aquarium Air Curtain Bubble Diffuser, 35.4-Inch, Black Aquarium Air Curtain; Material : Rubber, Plastic, Metal Tube Diameter(Approx.) : 11mm/0.4";Tube Length(Not Included Connector ) : 90cm/3Ft Connector Size : 4 x 2.4mm/0.15" x 0.09"(Outer Diameter * Inner Diameter);Color : Black Weight : 100g 1 x Air Curtain Bubble