Whatman PTFE membrane filters PTFE membrane circles, (TE 36), 0.45um, 47 mm, pack of 50 Whatman filter
MCE Gridded Membrane Filter, Sterile Individually Packed, Pore Size of 0.45um, Membrane Diameter of 47mm, Sterile Membrane Filter with Hydrophilic MCE Membrane Pack of 100 pcs by Alberts Filter : Amazon.in: Home
Whatman 10401170, Cellulose Nitrate Membrane, plain, sterile, 0.45 um pore size, 47 mm circle (100 pcs)