Joint: High grade PP material, to be 360°swiveled, easy for disassembly, cleansing and re-assembly swiftly. Sealing ring: Corrosion-resistant high-density rubber. Center bolt: 304 stainless steel. Adjustable joint knob: All stainless steel bearings to prevent rust from locking. Damper: To just air flow with a knob manually. Dome/cup hood: High Grade PP/PC. Tube:Φ75/110mm, PP/PVC/Aluminium alloy/304 Stainless steel. Swing device: with 360°swing device, take fixed rack as centre, max enabing movement radius to 1350mm, and the total length is 2800mm. Installation Bracket: Injection of plastics from a complete Mold, mounting panel strongly connected to the joint.