Vertex XL5 AirStation Diffuser Assembly

Self Sinking AirStation Assembly has a Heavy Duty HDPE plastic base that is spot-welded for long lasting durability and a hollow chamber design for the addition of gravel ballast.  Includes: Five Flexible, long-wearing and clog-resistant 9" rubber EPDM membrane diffusers FlowControl™ technology equalizes airflow to each disk  Energy-efficient die-cut perforations create efficient air-flow Lipped Designed prevents settling into soft bottom sediments or Muck Includes a 1/2" male fitting for BottomLine tubing connection Comes with a five year, no questions asked Vertex® warranty Made in the U.S.A.