for use with a 25mm membrane filter. Produced from borosilicate glass and furnished with glass frit filter support.. Suitable for aqueous and organic solvent filtration. The funnel seal ensures that the sample does not bypass the membrane and that particulates are retained on the surface of the membrane. The sintered glass support is recommended for filtration and biological analysis. Applications include: general laboratory microfiltration quality control and sterility testing removal of particulates from HPLC solvents and tissue culture media filtration.