Master DOC Skimmer 9480.000 (9480.000) Contains four Hydrofoamer Silence 9420.04, recommended for aquariums up to 8,000 l (2,113 USgal.) of salt water. Immersion depth of 160 to 370 mm (6.2 to 14.5 in.), dimensions: L530 x W500 x H700 mm (L20.8 x W19.6 x H27.5 in.) , 230 V / 50 Hz (115 V / 60 Hz), 60 W, water flow rate: 5,200 l/h (1,373 USgal./h); air capacity: 3,400 l/h (898 USgal./h), skimmer cup volume: 7 l (1.8 USgal.).