... Feature1,Application of new polymer materials, larger air-flow, lower noise, compact structure2,ROHS environmental protection authentication3 ... , corrosion resistance, anti-bending, anti-fallAxial Flow Fan Blade /Propeller Fan/ Axial Flow ImpellerProduct Specification: Φ556×167 (unit: mm ... detail drawings .For performance, we offer air flow and noise design according to customer requirements.In China ...