PINVNBY 4.2 Inch Air Stone Disc Bubble Diffuser with Suction Cups for Oxygenation in Fresh/Saltwater Tanks, Ponds, Hydroponic, Aquaponics, and as a Decorative Airstone for Aquariums 4 Pcs

Increases air flow/circulation to oxygenate water for health benefits to aquatic life,Add beauty to your display aquarium with this round air stone to create micro bubbles Specifications: 4.2 in x 0.75 in (108 mm x 19 mm) Connector size: 0.197 in (5mm), fits aquarium airline tubing (3/16 inch inside diameter) Bubble size: 300 - 500 microns Recommended air pump size: Greater than 4 watts Production process: Carborundum material sintered at a high temperatures of 1500 degrees Celsius to provide a high quality product. Other cheaper air stones use sand in place of carborundum and the quality cannot be guaranteed. Instructions: 1: Place air stone in water for 5 minutes before use 2.Connect airline hose to air stone with an air pump 3: Set air stone horizontally in water and use suction cups to hold in place 4:Turn on air pump and enjoy the bubbles 5.Clean air stone surface for increasing its lifespan 6.When not in use clean and store in a dry shaded area Package Includes: 4 x 4.2 in Round Air Stone ,12 x Rubber Suction Cups Note: 1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! If you have any questions or problems please feel free to contact us and we will try our best to solve them. with in 24 hourThank you for your purchase and support!