This Polydisc™ TF 50mm in-line filter device by Whatman® has a pore size of 0.1µm. It features a PTFE membrane which is ideal for chemically aggressive solutions reagents and organic solvents. This lightweight unit is particularly suitable for protective vents and for in-line filtration and isolation applications. It is fully autoclavable for sterile applications and may be re-used multiple times. It is integrity testable via bubble point or water breakthrough pressure 'in situ' methods. It is biosafe and Lightweight at 11.5 grams, avoids the collapsing of tubing which can be caused by heavy filter devices. Pore Size: 0.1µm. Whatman® #: 6720-5001.