Cellulose Nitrate Membrane Filter Whatman 7184-004 WCN Plain Pore Size: 0.45m, Diameter: 4.7cm Pack of 100 Descriptions : Membrane Filter Material: Whatman Grade WCN Cellulose Nitrate Pore Size: 0.45m, Diameter: 4.7cm Membrane filters have excellent flexibility and low level of extractables to ensure sample integrity Membrane filters have excellent flexibility and low level of extractables to ensure sample integrity Narrow pore size distribution of these filters provide for improved surface capture and analysis Pack of 100 Manufacturer: Whatman/GE Healthcare Manufacturer Part No: 7184-004