Check the listing for details. ATLANTIC DIFFUSERS AB-70008 Diffuser,Fine Bubble Tube,2-5/8 x 12 In 11M953. Condition: New. Listed at 49.99 USD. Diffuser, Diffuser Type Diffuser Tube, Air Flow Rate (Maximum) 6 scfm, Air Flow Rate (Minimum) 1.8 scfm, Active Surface Area 101 sq in, Compatible Intake Pipe Size 3/4 in, Minimum Depth Required 6 in, Bubble Type Fine, Bubble Size 1 to 5 mm, Number of Air Tubing Rolls 0, Number of Compressors 1, Discharge Type Disc, Active Membrane Diameter 2.5 in, Active Membrane Material EPDM, Air Tubing Diameter 3/4 in, Compatible with Media Type Wastewater, Oxygen, Filtered Water, Diffuser Frame Material PVC Atlantic Diffusers heavy-duty, rugged fine bubble tube diffuser offers a high oxygen transfer rate, making it an optimal choice for water aeration/oxygenation use and in water and wastewater treatment applications. The ethylene propylene diene monomer (EPDM) rubber membrane closes over the diffuser.