Diffuser, 8 1/2 L x 1 W x 1 H (In.), Mixair, Mfr#: Stone Replacement? SRB6

Diffuser, Air Flow Rate (Maximum) 0.3 scfm, Air Flow Rate (Minimum) 0.1 scfm, Active Surface Area 16 sq in, Compatible Intake Pipe Size 1/2 in, Minimum Depth Required 6 in, Bubble Type Fine, Active Membrane Diameter 0.9 in, Active Membrane Length 6 in, Compatible with Media Type Garden Water, Diffuser Hose Material Schedule 40/80 PVC