, , low consumption, low noise, super long working life. Adopt high-performance ceramic core shaft. The axis is enclosed with static sealing, not dynamic, which can avoid leaking problems. Submersible installation and waterproof. Features -Color: Black. -Material: Plastic, ceramic core, magnet. -Size: About 5.60X5.20X2.60cm/2.20X2.04X1.02in. - Semi-open impeller, good use effect. Good insulation, no water leakage, safe to use. - Mini size, suitable for home use. Effectively use in the fish tank or aquariums. - Compact structure and waterproof design, can be put into the fish tank, waterproof and safe to use. - The small pump is energy efficient and low energy consumption, no water leakage. - The reliable and durable motor does not produce much noise, giving you quiet environment. Specification: Flow: 0.25 3/h. Number of : 4. Cavitation allowance: 1 . Structural principle: jet pump. Number of stages: . Voltage: 5 : 2.3W. Rated voltage: USBDC 5V. Rated : 416 MA. flow rate: 220L/H. Noise: less than 37 decibels. Working life: hours. Outer diameter: inlet/outlet: 8.5mm/0.33 inch. Inner diameter: inlet/outlet: 6mm/0.24in. Waterproof rating: P68. Package list: 1 x miniature water pump 1 x U-shaped accessory