Diffuser, Air Flow Rate (Maximum) 2.2 scfm, Air Flow Rate (Minimum) 0.7 scfm, Active Surface Area 96 sq in, Compatible Intake Pipe Size 1/2 in, Minimum Depth Required 2 ft, Bubble Type Fine, Active Membrane Diameter 0.9 in, Compatible with Media Type Backyard Pond Water, Garden Water, Diffuser Hose Material Schedule 40/80 PVC