Biomed Scientific Syringe Filter PTFE Membrane 25mm Diameter 0.22um Pore Size Biomed Scientific Non Sterile Pack of 100
WHATMAN 7141-204 Mixed Cellulose Ester WME Membrane, Sterile, Autoclavable, 0.45 um Pore Size, 47 mm Diameter, White
Root Mushroom Farm 0.2 Micron Synthetic Filter Papers/fit for Wide Mouth jar lids/Used for Mushroom Cultivation/Pack of 12