The heavy-duty membrane with highly durable base which is constructed of molded polypropylene. The precision perforated 1 inch slits open when airflow is present, close when airflow is stopped, resist tearing, and stay cleaner longer. A standard 3/4 inch diffuser pipe thread makes it convenient to replace other coarse bubbler diffusers. 304 stainless steel clamping ring tightens to hold the membrane firmly in place. Center triple o-rings support the center of the membrane when airflow is absent.

Available in 9 inch and 12 inch Diameter sizes.