WINOMO Aquarium Bubble Wall Air Stone Bar Tube 10 inch Material: durable hard plastic and soft rubber Perfect for your fish tank or aquarium, and it is the best partner for air pump. Instantly create a great deal of tiny bubbles that your fish will love. The tube can be cut with a razor blade to be shorten. Additional bubble walls can be jointed with the enclosed connector Come with 2 rubber suction cups to produce enormous power to stick to glass surface firmly. Need to use a pin or needle to puncture for as many small holes as needed before using.