Technical Specification 30 " Aluminum Air Ventilator Model Standard Model Standard Diameter 38 " (965.2 mm) Pointer MOC 9.5 mm Ã?? EN-8 with Electroplating Neck / Throat Diameter 30 Inch (762 mm) Supporting Bush MOC Green Oilon No. of Vanes (Blades) 48 Vanes Center Shaft MS 19 mm Ã?? with Nickle plating Height 17 Inch (431.8 mm) Inner Arms (Pipe) MS with Electroplating Base Ring Stainless Steel (Jindal Make) Outer Arms MS with Electroplating Top Cover Stainless Steel (Jindal Make) Center Pipe MS 32 mm with length 240 Electroplating (30 mm Nut) Top Sheet MOC Aluminum 1.2 mm Thickness NetWeight 11.9000 Kgs (Approx.) Vanes MOC Aluminum 0.5 mm Thickness (Hindalco Make) Packing As per Box Packing Bottom Ring Aluminum 1.5 mm Thickness, C-Channel, (Hindalco Make) Vanes Size 435 / 70 Rotation Bush Support with Green Oilon Miscellaneous items like Nut, Bolt, Washer, etc. MS with Electroplating or Zinc Plating Galvanized