Single-pass, negative-pressure glovebox for weighing and handling high-potency compounds at OELs below 1 μg/m³, engineered and containment-validated to 5 ng/m³. Main chamber in 8mm optically clear cast acrylic with a black Trespa base and radiused internal edges throughout for thorough cleaning; safe-change HEPA filtration on inlet and exhaust, plus a dedicated sample transfer chamber. Built to custom dimensions for each application.