47mm 0.22um Single Packed Sterile Pes PTFE PVDF Nylon Filter Membrane White Micro Filter Membrane in Disc Filter Paper - China Membrane Filter, Pes Membrane | Made-in-China.com
SP Bel-Art | SP Bel-Art Cellulose Filter Paper Discs; for 36 in. I.D. Funnels (Pack of 100) | SP Bel-Art