Nano Stream 6045 features a mechanical flow adjustment. For aquariums from 40 to 500 liters (10 to 135 US gal.).Flow rate: 1,500 to about 4,500l/h (400 to 1,175 US gal./h). Energy consumption: 5 to 7W (115V/60Hz).Cable length: 2m (6.7 ft).Dimensions: diam. 70mm (2.75 in).Ejection: diam. 40/15mm (1.5/.59 in).Magnet Holder with Silence clamp up to a glass thickness of 15mm (1/2").