uxcell 11mm Diameter Rubber Tube Aquarium Air Curtain Bubble Diffuser Black 12" Long Product Name : Aquarium Air Curtain;Material : Rubber, Plastic Tube Diameter(Approx.) : 11mm/ 0.4";Tube Length(Not Included Connector ) : 31cm/ 12" Connector Size : 4 x 2mm/ 0.15" x 0.07"(Outer Dia*Inner Dia);Color : Black Weight : 50g Package Content : 1 x Air Curtain Bubble