Greatest coarse bubble air diffuser features 6" size, EPDM / silicone / PTFE-ABS / strengthened PP-GF MOC, ¾" NPT male thread connector, 2 mm membrane thickness, 1-5 m3/Hr design flow, 6-10 m3/Hr flow range, ≥10% 6 m submerged, 2000-3000 Pa headloss, 0.5 - 0.10 m2/pcs service area.