Vertex 9" Replacement Diffuser Disc

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9" Vertex®, MicronBubble replacement diffuser disc. Fits all Vertex® AirStations/Diffusers Self-cleaning and low maintenance EPDM compound with 100% rebound memory Flexible, long-w earing, and clog-resistant even in the dirtiest water bodies Highly efficient even during low or moderate air flows FlowControl™ technology equalizes airflow to each disk Energy-efficient die-cut perforations with a "Delta" surface pattern increase active surface area and aeration efficiency. StableTrak™ technology increases lift velocity Comes with a five year, no questions asked Vertex® warranty Made in the U.S.A. The plastic border color has been changed from purple to white, temporarily, due to supplier shortages. Show more