Adjustable aluminum alloy blades
This blade is made by Precision die casting aluminum alloy forming, positioning by the clamp type wheel casing, and the angle can be adjusted according to user needs, Can also be adjusted to make the blades generate the reverse flow, realization of the need to reverse ventilation, can be divided into positive and negative blade symmetric positive and reverse direction ventilation. There are six kind of blade installation according to adjust the angle from 15° to 40°. 

Eight blades
Unit: mm