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Looks like it might of been use one time if you look on the clock meter it’s says it all it’s tested and worked missing the attachment for it
Tiger Vac CR-4D Pharma Dry Recovery ULPA Lab Cleanroom ISO 4 Class 10 Vacuum
$700.00
Tiger-Vac AS-5 Dry Only Hepa Vacuum W/ 9 in x 4 .5 in H/Hose (NEW)
$220.00
Tiger Vac SS-15 4WRE Explosion Proof Stainless Vacuum Cleaner WET/DRY 45CFM 15HP
$705.49