SLGVM33RS. MilliporeSigma. 33 mm Medical Millex Filter Units A 33 mm diameter sterile syringe filter with a 0.22 µm pore size hydrophilic PVDF membrane. Medical Millex filters remove microorganisms, particles, precipitates, and undissolved powders larger than 0.22 μm from aqueous solutions. 33 mm. Compare this item.