... , air can be well-distributed PLASTIC 4-WAY PLENUM aluminium blade Characteristics1,Suitable for eco-cooler for vertical air supply, could ... stamping forming, it’s size precision and intensity is high4,Blade is aluminium extrusion molding, S-line structure, with it’s ... good properties for guide the wind, blade can manual adjustment, and the border coupling through core, flexible but don’t loose, easy ...