Shanghai Shanghai universal dimension universal hood hood manufacturer extended to increase Shanghai universal joint factory hood: High density PP material, can be rotated 360 degrees to adjust the direction of easy demolition, restructuring and cleaning Joint seals: not aging high-density rubber support spring / joint connecting rod: 304 stainless steel joint tension knob: All copper material, embedded stainless steel bearings, in the joints connecting rod lock Flow control valve: manual adjustment of external valve knob to control the air flow entering. Arch / cup-shaped collection hood: diameter 375mm, made of high density PP, red, white and transparent three options. Telescopic catheter: Diameter 75mmPP unique 360 ??° rotating device: the holder of the largest activity center radius of up to 1600mm fixed base: high density ABS material, non-adhesive made of one-piece injection mold, fastness, no slackness Description : PP material for acid / corrosion / heat / aging / anti-wrestling, etc., in line with the laboratory environment and security needs.