Fish Tank Aquarium Air Stone Bubble Wall - Aeration Tube Oxygen Pump Diffuser. FEATURES: Made of High-quality Material, Non-toxic, Safe, Durable and Also Environmentallyfriendly Easy to Install and the Air Inlet Head Could Be Disassembled for Easy 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 a Strong Suction Cup, It Could Firmly Fix the Bubble Tube on the Wall of a Fish Tank, the Bubble Tube Won't Float on the Water, Practical and Durable The Air Bubbles Are Uniform and the Dissolved Oxygen in Water is Increased, Suitable for Use in Both Freshwater and Seawater Can Help to Extend the Life of Air Pump Motor, Energy Saving and Reduce Noise Need to Use a Pin or Needle to Puncture for As Many Small Holes As Needed Before Using SPECIFICATIONS: Material: Plastic Weight: Approx. 22-45g . We are an international based seller that will ship your order from abroad, please at least a minimum 14 working days for delivery right now due to the ongoing delays in shipments globally.