... effect, the pressure coefficient is high, good material, durability and other characteristics, most of products are used in air ... , air purifiers, FFU, exhaust fan, ventilation system and so on. .Model Example:No.1:Ø300x130300 means the Diameter of blower ... ………………RemarkSpecial type of centrifugal blower wheels, not being our model, according to the customer's specific requirements, to sample ...