Hydrophilic: eliminates the need for wetting agents that can potentially interfere with analyses. Low extractables: ensures test results will not be compromised by wetting agents or other extractables. Low drug and protein binding: maximizes recovery of critical drugs or proteins. Wide range of pore sizes: pore size range of 0.03 µm to 5.0 µm enables specific pore size selection for given applications. Superior burst strength: protects the integrity of the membrane under high pressure. Quality checks ensure lot-to-lot consistency, both down and across the polyester web, for dependable results every time.