Structure: ball bearing or ogalloy Name:high efficient cross flow fan Material: Aluminum Size: wheel diameter 45mm, length 75mm---360mm, or as customers request Motor: it is designed suitable silent operation by using selected motor of low-noise and high- efficiency. It is UL certified. Description: distribution of air velocity is uniform Usage of cooling device: power source device, transformer, duplicating macline, projector, etc. Usage of cooling and heating: cooling and heating machine, heating system, ventilator in car, air curtain, etc. Electric machine for home use: motor fans, small ventilator electrical warmer, micro-wave oven, air-circulator in refrigerator and warm keeper, electrical cooker, hair dryer, etc. Fan can be served in insulation class H. High efficient tangential fan, cross flow blower, cross flowimpeller, cross flow fan More detailpleasefeels free tocontact me.