EcoPlus® Aqua Lung Air diffuser uses a precision molded rubber membrane to expel micro bubbles that maximize oxygen transfer levels in your water or nutrient solution. The membrane is constructed with EPDM material and secured with chemical resistant ABS molded plastic. Used in the water treatment industry for years, this product has proven performance. Air supply connects to the built in 3/4 inch male pipe thread fitting. 10 inch in diameter. Durable, cleanable and easy to use. For use with EcoPlus® Commercial Air Pumps and Air Force Pro® Linear Air Pumps.