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 transparent for choose.
fixed frame: high density pp material, fixed to lab roof with m12 expansion screw.