Polydisc TF is a lightweight unit is particularly suitable for protective vents and for in-line filtration and isolation applications. Solvent-resistant membrane. Chemical-resistant housing. Hydrophobic PTFE membrane. Autoclavable (multiple times). Integrity-testable (bubble point or water breakthrough pressure in situ methods). Biosafe. Lightweight: Avoids the collapsing of tubing that can be caused by heavy filter devices. This device features a PTFE membrane, which is ideal for chemically aggressive solutions, reagents, and organic solvents. The 1 µm device features a polypropylene prefilter for use with heavily contaminated samples.