ABS body with EPDM Membrane Diffuser 

3/4" thread for use with the Matala Diffuser Bases

BHB-MD-250 

• 9.8" Diameter
• cfm/lpm - 1.4-3.5 / 40-100

BHB-MD-320

• 12.6" Diameter
• cfm/lpm - 1.4-4.2 / 40-120