1,OEM &ODM for HVAC&R ,enough capacity 2, larger air-flow 3,lower noise 4,corrosion resistance 5, ... temperature resistance, corrosion resistance, anti-bending, anti-fallAxial Flow Fan Blade /Propeller Fan/ Axial Flow ImpellerProduct Specification: Φ556×167 (unit: mm)Materials ... air conditioning manufacturer ,including Midea ,Gree ,AUX, CHIGO ,LG ,etc. propeller Fan-556*167