This HAILEA Air Pump features an adjustable output offering maximum flexibility in a range of outlet options. It is super silent with a multilevel muffler. It has an output of 4mm and a low power consumption. It produces 10 litres per minute. Our range of Hailea air pumps all feature adjustable outputs offering maximum flexibility in a range of outlet options. The diaphragms are easily replaced when needed, so you will have the use of these pumps for years. Multiple outlet and output versions are available. These pumps are designed for continuous use but also have low rate of power consumption.