Fume-and-Vapour-Extraction-Unit-BenchVent-BV500S-D-p-A-fume-and-vapour-extraction-unit-that-uses-a-2m-x-Oslash-100mm-flexi-duct-to-vent-harmful-and-unwanted-vapours-to-either-a-standard-domestic-vent-or-a-convenient-window-Suitable-for-use-within-laboratory-workshop-classroom-and-anywhere-where-there-is-a-need-for-the-extraction-of-fumes-and-fine-particles-whilst-handling-monomers-adhesives-hazardous-powders-conformal-coatings-resins-sealants-solders-light-grinding-particles-and