Millex-VV Syringe Filter Unit, 0.1 µm, PVDF, 33 mm, gamma sterilized A 33 mm diameter sterile syringe filter with a 0.1 µm pore size hydrophilic PVDF Syringe Filters - Sigma-Aldrich High performance sterile and nonsterile syringe filters offered in a variety of membrane materials and pore sizes, tailored for sample preparation for HPLC,