1、The tube body is made of high-quality plastic material, air inlet is made of silicone material, non-toxic, environmental-friendly, safe and durable to use 2、Very easy to install in your fish tank, and the air inlet head could be disassembled for easily cleaning, keeping air intake freely 3、The bubble tubes could be extended, double tubes could be easily connected by the plastic connector, so you could connect them into a suitable length to meet the length of your fish tank 4、With super strong sucker, it could tightly fix the bubble tube on the wall of fish tank, the bubble tube won't float on the water, practical and durable 5、The air bubbles is uniform and the dissolved oxygen in water is increased, and it is suitable for using in both fresh water and seawater Description: Our bubble tube is made of high-quality plastic and silicone material, very safe and durable. Its air bubbles is uniform and the dissolved oxygen in water is increased, and it's suitable for using in both fresh water and seawater. It is very easy to install in your fish tank, and also easy to disassemble for easily cleaning. The bubble tubes could be extended to meet the length of you fish tank, practical to use. Strong sucker also can tightly fixed the tube, the tube won't float on the water. Such a great bubble tube, worth buying for your fish tank! Features: The tube body is made of high-quality plastic material, air inlet is made of silicone material, non-toxic, environmental-friendly, safe and durable to use. Very easy to install in your fish tank, and the  air inlet head could be disassembled for easily cleaning, keeping air intake freely. The bubble tubes could be extended, double tubes could be easily connected by the plastic connector, so you could connect them into a suitable length to meet the length of your fish tank. With super strong sucker, it could tightly fix the bubble tube on the wall of fish tank, the bubble tube won't float on the water, practical and durable. The air bubbles is uniform and the dissolved oxygen in water is increased, and it is suitable for using in both fresh water and seawater. Specifications: Condition: 100% Brand New Type: Fish Tank Air Pump Accessory Material: Plastic + Silicone Color: Shown as picture Length: Approx. (Optional) 1# 19.5cm / 7inch, 2# 24cm / 10inch, 3# 39cm / 15inch, 4# 47cm / 18inch, 5# 58cm / 23inch, 6# 71cm / 28inch. Weight: Approx. 22g-40g Package Included: 1 x Air Stone