JCO-02: 4.5 PSI @ 40 LPM (1.412 CFM) 110 VAC 35 Watts JCO-012 : 6.1 PSI @ 150 LPM (5.297 CFM) 110 VAC 185 Watts ELECTROMAGNETIC AIR PUMP is the perfect choice for Compost Tea brewing systems. This air pump is reliable and durable, designed to last you a long time.