●The surface of the COBETTER filter membrane is smooth and flat, which is convenient for microscopic observation. ●130°C Max. Temperature. 75%Porosity. Individually packed. ●【3.1 mm intervals】Grid facilitate counting colonies on the filter surface without compromising colony growth. ●【High Quality】Excellent microbial retention efficiency and recovery growth rate.Meet the quality inspection needs of pharmaceutical and other industries. ●【ISO Certificate】Cobetter Quality Systems is compliant with ISO 9001 : 2008. Design, manufacture and sterilization processes meet cGMP requirements.