Our sterile, white, gridded, Mixed Cellulose Esters (MCE) membranes--a versatile mixture of cellulose nitrate and cellulose acetate fibers--are general purpose filters with high recovery rates, high porosity, and superior flow rates. These pre-sterilized filters are suited for single use in many microbiological applications, including the examination of water, wastewater, pharmaceuticals, food, and beverages.