三层结构，中间一层滤网（孔径0.33mm），样品放入过滤网一侧，均质后从另一侧取样，避免固体物质对分析造成影响，同时也更方便使用移液管取样。

适合于液体样品采样，密封性*，能折叠三次。zui高使用温度达82°C ，可以在任何低温下使用，甚至液氮环境。所有产品都经过严格的灭菌处理，请放心使用。

These special bags contain a third layer of finely perforated polyethylene, which filters out the solids in the sample when used in a homogenizer blender. Bags feature a filter layer of finely perforated polyethylene, to separate the liquid and solids, allowing for easy pipetting of the sample. The hole diameter in the filter layer measures .013 inches （.33 mm）, 330 microns, and there are 1,840 holes per square inch, 285 per square cm. The filter 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; bags should not be used at temperatures above 180° F （82° C）. Bags can be frozen to any temperature, even liquid nitrogen – careful handling required after freezing. All bags are sterilized after manufacturing.