Fan BladeMaterial: 430krupp Stainless steel with 1.2mm thicknessFeature: Blade shape is designed after double tested. Big airflow, No deformation, No broken.Belt PulleyMaterial: Aluminum-magnesium alloyFeature: Good outlook with light weight. Especially to reinforcing rib to increased strength. No broken. Long service life.Blade HubMaterial: Aluminum-magnesium alloyFeature: Fan blade hub is made by primary pressing. High strength, No deformation and broken. Smoothly edge. Highly accurate position. Easy to install.BeltType: Chinese belt and Japanese Mitsuboshi brand beltFeature: Long service life and no repair.BearingFeature: High quality double-row bearing, high intension, low noise, long service life.Blade SupportMaterial: Hot-dip galvanized 3mm thicknessFeature: Top and bottom support base made by aluminum-magnesium alloy. It's avoid the rusty problem. Easy to fix and ensure long service life.FrameMaterial: 275g coating weight galvanized sheetFeature: KEHE has advanced production technology with automatic equipment. Professional production line, NC-based professional equipment. Auto punching and bending. Highly-accurated.Protection MeshMaterial: Hot-dip galvanized wire with electrostatic plastic spraying.Feature: It's no easy to get rusty. Attractive and durable.MotorType: Chinese motor and Siemens motorFeature: Volt and frequency can OEM upon to your request. Chinese motor with phase failure protective device to ensure motor working well. Motor protection class: IP55, Insulation class: F grade.