type b2 biosafety cabinet nuaire b2 biosafety fume hood cl ii type b1 biosafety cabinet cl ii biosafety cabinets nuaire labgard es nu 425 biosafety labgard nu 540 cl ii biosafety nuaire 5 cl ii type a2 bsc 120v 60 series laminar flow biological safety nuaire labgard es nu 540 cl ii type biosafety cabinet cl ii b2 3 x 2 x 2 cl ii biosafety cabinet manual nuaire type b2 biosafety cabinet esco labculture cl ii type b2 total exhaust biosafety cabinets used nuaire nu 430 400 cl ii b2 4ft type a2 handling biosafety cabinet series laminar flow biological safety nuaire biosafety cabinet labguard nuaire labgard es nu 540 cl ii type bioclic bh dual access cl ii type nuaire labgard es nu 543 cl ii type labgard es energy saver cl ii type nuaire labgard es nu 813 bench top custom biosafety cabinets cl ii series laminar flow biological safety nuaire nu 602 400 labguard cl ii