Sartorius, 17574----------K, Minisart 0.45um, SRP15 Syringe Filters, Polytetrafluorethylene,50pcs. Minisart® SRP syringe filters with a clean and chemically inert PTFE membrane. The units are ready-to-use and allow for simple, rapid and reliable ultracleaning of small volume samples for HPLC or GC analysis, which require an even more chemical