See more about this article : DOC Skimmer 9410

Recommended for aquariums up to 1,000 litres (264 USgal.) of salt water.
Immersion depth from 140 mm (5.5 in.) to 240 mm (9.4 in.),
Dimensions without post-filter: L250 x W113 x H418 mm (L9.8 x W4.4 x H16.4 in.)
230 V / 50 Hz, 11 W
Water throughput: 900 l/h (237 USgal./h)
(115 V / 60 Hz, 15 W, water flow rate: 999 l/h (264 USgal./h)
Air capacity: 600 l/h (158 USgal./h), skimmer cup volume: .7 l (.18 USgal.).