Joint:High grade PP,to be 360°swiveled,dismantled&assembled easily for cleaning                    Guiding ring:Low-friction treated rubber                          Center bolt:304 stainless steel   Adjustable joint knob:High grade PP with a moded-in s/s bearing locking with center bolt              Damper:To manually adjust air flow with a knob                    Dome/cup hood:High grade PP/PC    Tube:Φ75mmPP                      360°swing device:Enabling movement radius to max.1600mm     Installation Bracket:Injection of plastics from a complete mold,mounting panel strongly connecting to the joint