Features: Made of high quality bearing, smooth rotation, long lifespan. This pump can rate of 0.4-1l /min, and the pressure is suitable for long working time below 3bar. Compact size, strong structure and durable. Easy to install and maintain, low noise, superior performance. Widely used in instruments and equipment, medicine and chemical industry, home appliances and other fields. Specification:Type1 Material: Plastic & Metal Weight: 239g/8.4oz Voltage: 12V Gas Pressure: 1bar Liquid Pressure: 3bar Liquid Rate: 320ml/min Gas Rate: 3.2L/min Self-priming Height: 4 meters Working Environment: 0~40℃ Size: 3.3*8.5cm/1.3*3.3inch (as pictures shown) Specification:Type2 Voltage: 24V rate: liquid (320ml/min), gas (3.2L/min) Self-priming height: 4 m Pressure: liquid (3bar), gas (1bar) rate: 0.4 -1L/min Ambient temperature: 0-40℃ Size: 8.5*3.3cm/3.4*1.3in Weight: Approx.239g/8.4oz Package list: 1 x Diaphragm Pump Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real as standard. Made of high quality bearing, smooth rotation, long lifespan. This pump can rate of 0.4-1l /min, and the pressure is suitable for long working time below 3bar. Compact size, strong structure and durable. Easy to install and maintain, low noise, superior performance. Widely used in instruments and equipment, medicine and chemical industry, home appliances and other fields.