uxcell Aquarium Fish Tank Bubble Wall Air Stone Tube 7inch Length 2Pcs Blue Color: Blue; Package Content: 2 x Aquarium Bubble Wall Air Stone Tube Total Size: Length:18cm/7"; Material: Plastic,Rubber Product Name: Aquarium Bubble Wall Air Stone Tube; Net Weight: 45g Tube Diameter (Approx.): 10cm/0.4" Suction Cup Dia: 2.5cm/1"