The cover suction series ring blower are designed for our specificcustomers. On the front cover, There is an inlet and an outlet, whichmake customers use their own products flexibly. The customers are notonly able to use the inlet and outlet to suction and blow, but also areable to use the original inlet and outlet on the rear housing to suctionand blow. Then it will reduce customers' cost of product materials aswell as decrease the freight cost due to the smaller volume of products.This design has been widely used on industrial vacuum cleaners,automatic hopper loaders and dental suction systems. As a result, Ourprofessional OEM design has been appreciated by many of our customersbecause we help them win more markets.