This Whatman 6870-1304 GD/X 13 mm Syringe Filter 0.45 µm Nylon Membrane / Pack of 150 is in new, unused condition and is guaranteed to be fully functional. These filters came from a local lab that closed down and had been stored as replacement inventory. Boxes are sealed in original factory packaging. Please feel free to contact us with any questions. 0.45µm Pore Size; Whatman? GD/X? 13 is the ideal syringe filter for the preparation of hard-to-filter samples Nylon Membrane Filter; Diameter: 13mm GD/X? 13 syringe filters can process three to seven times more sample volume than standard syringe filters GD/X? 13 syringe filter is specifically designed for high particulate loaded samples up to 10mL in size Exceptional loading capacity with fast flow rates; this prevents the build-up of back pressure typically caused by the blocking of an unprotected membrane Pack of 150 Manufacturer: Whatman Manufacturer Part No: WHA-6870-1304