This 7-1/2 x 15in sterile Whirl-Pak® Filter Bag for homogenizer blenders is made from extra-heavy polyethylene with a strong perimeter seal. The bag has a third layer of finely perforated polyethylene that filters out solids in the sample. The hole diameter in the filter layer measures 0.013in (0.33mm), 330 microns, and there are 1,840 holes per square inch, 285 per square cm. The filter layer is sealed into the perimeter of the bag on the sides and bottom, allowing the sample to be placed in the bag on either side. The liquid will transfer through the filter, but the solids stay on one side. Capacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Volume and dimensions are approximate. Bag should not be used at temperatures above 82°C (180°F). Bag can be frozen to any temperature (careful handling is required after freezing). Sterilized after manufacturing. Material: Extra-Heavy Polyethylene. Hole Diameter: 0.013in (0.33mm); 330 microns. Holes/sq. in: 1840. Holes/sq. cm: 285. Dimensions (W x L): 7-1/2 x 15in (19 x 38cm). Thickness: 4mil. Capacity: 69oz (2041mL). Nasco® #: B01416WA.