37 millimeter; black, grid surface; aerosol analysis monitor; transparent; disposable; plastic filter holders preassembled with type mf millipore filters in place for particulate analysis of aerosol samples by vaccum filtration; filters are sealed between monitor sections with a thin cellulose pad under filter to distribute sample flowevenly over filter surface; monitors are designed for use with vacuum only; inlet and outlet connections are female luer slip; contains two superimposed filters matched in weight within 0.1 mg; packaged 50 each per package
