Shimadzu High-grade Hydrophilic PTFE filter membrane material to ensure filtration effect. 25 mm diameter, 0.22 µm pore size 

Hydrophilized polytetrafluoroethylene is used as membrane material. H-PTFE membrane is hydrophobic with additional hydrophilic characteristic . This product is very resistant towards all kinds of solvents as well as acids and bases. (PTFE/L imprint on filter)