Thank you for viewing. I purchased this new and used it for one year. Brand: GEX Material: Rubber Item Weight: 0.45 kilograms Product Dimensions: 12.2 length x 11.2 width x 6.8 height cm Power Source: Corded Electric Air Flow: 2 LPM Body size (width x depth x height): 11.2 x 12.2 x 6.8 cm Body weight: 0.45 kg An air pump for ornamental fish that combines low vibration, quiet operation, and high power. Low vibration, quiet operation: Silent Force 2000S Combines low vibration, quiet operation, and high power. Two low-vibration structures: Low vibration is achieved by canceling out vibrations with two diaphragm drives. Uses vibration-absorbing rubber feet. Two quiet structures: Quiet operation is achieved by lengthening the ventilation distance with a cylindrical shape, reducing noise by approximately 20%. Noise is reduced with three air filters. Body size: Width 11.2 x Depth 12.2 x Height 6.8 cm Suitable aquarium: Aquariums with a water depth of 40 cm or less and a width of 60 cm or less Discharge rate: 2.0 L/min Number of outlets: 1 Power consumption: 1.8W (50Hz) / 1.7W (60Hz)