... 1.plastic fan blades 2.axial impeller 3.propeller 4. with RoHS axial flow fan blades ... Application of new polymer materials, larger air-flow, lower noise, compact structure2. ROHS environmental protection ... OEM spec. is welcome. Axial Fan Blade /Propeller Fan/ Axial Flow Impeller Size:Φ401×115 (unit: ... 317, Φ320, Φ325, Φ350, Φ352, Φ380…and so on.Cross Flow Fan Blade:Φ77, Φ81, Φ85, Φ88, Φ88.8, Φ89, ...