Maine Membrane Filtration Pack 10497500 by Maine Manufacturing GROUP: Lab Equipment & Accessories:Microbiology Products:Membrane Filtration Item Description: Microbiological Monitor, 47mm, 0.45�m Pore Size, White/ Black Grid, 100mL, 50/pk Packaging Desc: Monitor Microbio Wh/Blk Grd47Mm 100Ml 0.45Um 50/Pack Country of Origin: US Harmonized Tariff Code: 8421.29.00 Product Description: