The Syncra Silent is new range of energy efficient pumps that is absolutely silent. Don't be fooled - these pumps are powerful and versatile. Ideal for fresh and salt water aquariums, protein skimmers, indoor fountains, water-cooling and all submersible and in-line applications which require high performance and total silence. Thanks to Sicce’s 35 years of experience, Syncra Silent are equipped with a synchronous motor and an advanced rotor which makes the pumps 100% silent. Features: all models available with 6' bi-polar or 20' grounded cord flow rates from 185gph to 1321gph ceramic shaft and bearings durable rotor and shaft standard thread intake & discharge barb fittings included resistance to harsh conditions Submersible or inline use adjustable flow rate 3-year &nbs