Cellulose Nitrate Filter Paper 0.45 micron dia 47mm pack of 100 suitable for millipore membrane filter set AC-607M4547 AC-2270m | Chemistry Bio Chemistry | Abronexport.com
50pcs/lot 0.45 Or 0.22um 150mm Microporous Mce Water Microfiltration Membrane Filter Acetate Cellulose - Funnel - AliExpress