Stratus SRC Series "Gen 2" Rocking Piston Compressors are specifically designed for the demanding job of 24-hour operation, making it ideal for pond aeration systems. The shore-mounted compressor sends air through tubing to a bottom mounted diffuser for a safe, effective way to aerate ponds. Units include air filter, rubber feet and 5' power cord. Oil-free motor and permanently lubricated bearings Universal dual voltage motor; single or double cylinder design Includes Stratus Smart-Start technology to start under load Superior quality, flexible cup material for increased reliability Die-cast body components for overall strength Maximum 30 psi 2 year warranty SKU Power Voltage Amps Operating Cost Max Airflow Ship Wt SRC25 1/4hp 115v 1.7A $0.40 / 24hr 2.3cfm 17lb SRC252 230v 0.9A SRC50 1/2hp 115v 3.6A $0.86 / 24hr 4.5cfm 22lb SRC502 230v 1.8A SRC75 3/4hp 115v 4.5A $1.10 / 24hr 6.5cfm 26lb SRC752 230v 2.3A Specifications Manual