Hydroponics"MAC-DADDY" Air Diffuser Hose by Bubblemac Industries, Inc. presents"Bubblemac Bio-Weave Air Diffuser Hose", specifically designed for"THE SERIOUS HYDROPONICS ENTHUSIAST" Bubblemac Industries, Inc. has been the sole manufacturer of Bubblemac Bio-Weave Air Diffuser Hoses since 1995. Recognized worldwide in the aquatics industry, our standard hoses are great for use anywhere you require or desire flexible aeration. THIS NEW DESIGN, in a 20" diameter ring with a 3/8" brass hose barb is designed for large culture tanks and is great for introducing air and oxygen. SELF-WEIGHTED DESIGN. Constructed of a strong, woven fiber material that will last for years, these hoses have been time tested again and again. Stainless Steel Bands and the Brass Connector help to ensure a long life regardless of pH variations. This Medium-Bubble Diffuser {1-3MM Bubbles}, has a recommended CFM of 1.0-3.0 and has about a 20" H2O Resistance to air flow making it marginally compatible with regenerative blowers. Made In The USA, One-Year Warranty. "This ain't your daddy's diffuser hose." Like all Bubblemac Aeration Products the "MAC DADDY" comes with a "No Questions Asked, Return Policy." If you aren't completely satisfied with your purchase, simply return the product for a full refund!