Air-Extraction-Unit-Bench Vent-BV300S-D-p-This-air-extraction-unit-uses-a-flexi-duct-to-carry-away-extracted-air-either-via-a-standard-domestic-vent-or-simply-placed-through-a-partially-opened-window-making-the-unit-very-portable-&-convenient-The-unit-can-be-used-in-one-of-two-positions-either-upright-for-3D-items-such-as-models-PCBs-etc-where-they-can-be-rested-on-the-surface-&-where-solder-fumes-&-general-solvent-&-gas-extraction-is-performed-The-second-position-the-unit-can