BubbleMac Aeration Products Aquarium Air Stone Bubble Bubba, America's Favorite Air Diffuser !! 100% Glass-Bonded Silica Fine Pore Air Diffuser BE SURE TO SEE OUR ENTIRE GALLERY OF PRODUCTS!! - Bubblemac Aquarium Air Diffuser designs are unlike anything currently available on the market. Model BB1030F is an ultra-fine pore bubble stone that emits a "cloud" of tiny bubbles {0.5-2.0 MM}. - DURABLE, AFFORDABLE and EASY TO MAINTAIN. Made in the USA. - With 50,000 diffusers sold in 2016, the Bubble-Bubba has earned a reputation as "Americas Favorite Air Stone" Diffuser measures 1" x 1" x 3" with a 3/16" air line connection barb. {Suggested CFM=.30 or 7-10 lpm}, making this diffuser compatible with most low cost air pumps. SELF-WEIGHTED DESIGN. {You don't have to "weigh-it-down", it will stay put!} This small design "Bubble Bubba" will outperform much larger import blue stones which are prone to breakage. DON'T WASTE ANOTHER DOLLAR ON STONES THAT "GO-AWAY" IN A SHORT TIME.... THIS DIFFUSER IS GUARANTEED FOR TWO FULL YEARS! -- Bubblemac Silica Air Diffusers are renouned worldwide for the past 30 years as the most efficient method of increasing oxygen levels in a tank. {Be sure to check out "bubble-bubba bumpers", diffuser protectors, also available on Amazon} NEW--Also now available on Amazon {Bubble-Bubba With Diffuser Bumpers} Diffuser Specs: 100% Glass-Bonded Silica Fine Pore, Maximum Pore Size 80 Microns, Nominal Partical Retention 25 Microns, Flexural Strength 3500 PSI, Bubble Size 0.5-2.0 MM, UNLIMITED SERVICE LIFE when used in pH of 8.0 or less.