Joint: High grade PP, to be 360 swiveled.
Guiding ring: Low-friction treated rubber, installed between two joints, rotate easily and sealing
Center bolt:304stainless steel
Adjustable joint knob: High grade PP with bronze nuts locking with center bolt
Damper: both gas flow regulating button and wind board are high grade PP material, connected with 304 stainless steel bar, manually adjust the outside valve
knob, control air flow
Dome/cup hood: Diameter 375mm/200mm, High grade PP, red, white and...