Nalgene* Sterile Analytical Filter Units with CN Membrane

Disposable, pre-assembled, pre-sterilized filter units and funnels with triton-free cellulose nitrate (CN) membranes which are easily removed for culturing or other analysis. Upper twists off easily for improved retrieval of the 47 mm diameter membrane. 0.45 µm pore size are certified for water quality work. Wider base is stable on the bench. Non-silicone gasket minimizes risk of contamination. Excellent for microbial analysis, sterility testing, water quality or environmental testing.