EasyPro double compressor systems are designed for large ponds and lakes where high volumes of air are needed. All compressors mount into the SC28 large cabinet, allowing up to twelve air lines from a single location. Since the amount of tubing needed can vary widely in larger projects, these systems are designed with everything you need for a complete system except the tubing. Rocking Piston Systems include compressors, valve assemblies, pressure gauge, pressure relief valves, high volume cooling fans and an electrical box, all contained within a cabinet mounted on an equipment base. Includes self-weighted diffusers. Model Included Compressors Volts Diffusers Total Airflow Wt DCS64AD (2) 1/2HP SRC50 115 4 9cfm 185lb DCS64AD2 (2) 1/2HP SRC502 230 4 9cfm 185lb DCS66AD (2) 1/2HP SRC50 115 6 9cfm 209lb DCS66AD2 (2) 1/2HP SRC502 230 6 9cfm 209lb DCS86AD (2) 3/4HP SRC75 115 6 13cfm 227lb DCS86AD2 (2) 3/4HP SRC752 230 6 13cfm 227lb DCS88AD (2) 3/4HP SRC75 115 8 13cfm 250lb DCS88AD2 (2) 3/4HP SRC752 230 8 13cfm 250lb Ships by truck freight, which requires that you be present at time of delivery. Freight company will call to schedule an appointment.