1.used widely 2.low boise 3.low cost 4.save more electric The advantages and construct of productAll made of a new material PP, never use the used material. The total weight of plastic is 37kg.Made up of 3 vanes, with strong structure, low noise and large flow.Sink is deep, Sewage overflow valve port is high, so it’s convenient to adjust the water level.This unique duct can make the noise low and ...