Easypro Quad Membrane Diffuser

Features: Membrane air diffuser assembly that features a hollow base that can be filled with sand or gravel Eliminates the need for bricks and straps to get the diffuser to sink! Available in single, dual or quad head assemblies Quad head handles airflow from 3.2 - 12 CFM 3/4" female threaded outlet located in the base of  each diffuser, 3/8" and 1/2" barbed tubing adapters included