Uxcell Diffuses Bubble Wall Tube Fish Tank Air Stone, 7-Inch, Blue Product Name : Bubble Wall Air Stone Tube; Suitable for : Fish Tank, Aquarium Fit for Aquarium Oxygen Pipe External Dia. : 6mm/0.24"; Design : Tube Shaped Material : Plastic, Rubber; Tube Size(Jointed) : 17.8 x 1cm/7" x 0.39" (L*D) Color : Blue; Weight : 21g Package Content : 1 x Bubble Wall Air Stone Tube