Fish 2Pcs Plastic Aquarium Air Stone Pond Fish Tank Pump Aerator Aeration Hydroponic Oxygen Air stone Accessories with Suction Cups Aquarium Air Stone Fish for Tank for Nano Air Bubble Disc with Suction Cup Quiet High Dissolved Oxygen Diffuser Tiny Bub

Features:Increase oxygen levels, lower CO2 and raise PH, creates water currents It is an important instrument to successfully keep aquatic fish for respiration process. Durable, can be reused and washed repeatedly. Strong Suction Cup. Rotary design to control the bubbles. Creates bubbles in fish tank while attached to an air pump(air pump and air tube is not included).Specifications:Color: Black (white pad)Material: plastic (cotton pad)Item Size: Approx. 3.5x6.5cm Dia. of replace cotton: about 3.2cmAir Tube: Inner dia. 4mm.; Outer dia. 6mmPackage include:1pcs /2pcs Aquarium Air Bubble StoneNote:-Soak in water for 15 minutes before use.-For long-term use, if there is dirt blockage, and the bubbles is reduced, please take it out of the fish tank and wash it again and again.-The air stone can be used repeatedly.-Please allow 1cm differs due to manual measurement.-Due to the different display and different light, the picture maybe a little different with the actual color of the item. Thanks for your understanding.