Easy to use Standing Type Filter Each filter will treat a system up to 150 litres 3-watt air pump is sufficient to run each filter (not included) Media: 150ml of ZM-II included New upgraded Ziss moving media (ZM-II) included Excellent Biofiltration by direct oxygen supply Stable filtration by self-cleaning filter media Physical filtration by contained filter sponge Made from High-quality material Made in Korea Size: Hight: 16 cm x Diameter: 9.3 cm