Nylon Membrane Filters, 0.22 Micron, 300 x 3000mm, 1/Pk. Nylon membrane filter roll: 0.2 µm pore-size, 300 x 3000 mm. Hydrophilic, low-extractable, inert, durable material supported by an internal polyester web. Typically used for HPLC, microbiology, medical/clinical, and general filtration.