Oct 29, 2021 · Whatman 6720-5002 50 mm in-Line Filters, PTFE, 0.2µm, 10/pk. Autoclavable, a high-purity polypropylene housing maintains sample purity. Hold up volume with air Purge is less than 0.1 ml. Maximum operating pressure is 60 psi (4.1 bar). filters with PTFE membrane are ideal for chemically aggressive solutions, reagents, and