1, little vibration, low noise 2, high pressure, high efficiency 3, simple structure, easy disassembling 4,small volume, ligh structure ... the main shaft overhang end to pump for clockwise rotation.3 g series three screw pump material 3G Series pumps usage: ... low noise.3, high pressure, high efficiency.4, simple structure, easy disassembling.5, small volume, light weight.6, wear light, long life 3 g ...