Whatman Polycap TF capsule filters from Cytiva are made with durable, hydrophobic polytetrafluoroethylene (PTFE) membranes in a polyproplyene housing for use with organic solvents and chemically aggressive solutions. PTFE filter membrane is resistant to most solvents. Available in 0.1, 0.2, 0.45, and 1.0 µm pore sizes. Send Inquiry.