Maine Membrane Filtration Pack 1214861 by Maine Manufacturing GROUP: Lab Equipment & Accessories:Microbiology Products:Membrane Filtration Item Description: Nitrocellulose Membrane without Pad, White/ Black Grid, Sterile, 0.22�m, 47mm, 200/pk Packaging Desc: Membrane Nc Disc Wht/Blk W/Outpad .22Um 47Mm 200/Pack Country of Origin: Harmonized Tariff Code: Product Description: