Rubber Membrane Diffusers are nearly indestructible. Made from EPDM rubber, they easy to clean and produce a slight larger bubble than the HD Glass Stone Diffusers.
Rubber Membrane diffusers come with a standard 3/8" barb fitting along with a stainless steel hose clamp.
Recommended Air Flow:
6 inch: .4 CFM
8 inch: .7 CFM
12 inch: .9 CFM