Adamas-Beta 100 Pcs. Syringe Filter, Syringe Lab Filters,, Green. SPECIFICATION - Diameter: 25mm, pore size: 0.22?m, 100pcs PREMIUM MATERIAL - PES membrane with PP housing. Polyethersulfone microporous membrane belongs to hydrophilic membrane, with high flow rate and lowest protein adsorption. CHEMICALLY STABLE - PES syringe filter has high chemical and thermal stability, acid and alkali resistance, and high mechanical strength. UNIFORM PORE SIZE - The pore size distribution of the filter membrane is uniform, the porosity is high, and the filtering effect is good, easy to identify the filter membrane and pore size. APPLICATION - Widely used in science laboratories for filteration of small volume samples, such as protein, culture medium, additives, buffers and reagents.