特殊设计可使样品保存长达2年以上时间，Whirl-Pak®长期保存样品袋是用户节省了金钱和空间，且表面附书写区，方便记录各项采样信息。

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。

For long-term storage （up to two years）, the Whirl-Pak® Retain Bag will protect the sample and save money and space.
• Made from a barrier film of polyethylene and polyester
• Has extremely low permeability for oxygen and moisture
The result is that sample integrity will be maintained during storage for both liquids and solids. These bags are sterilized with radiation, because gas sterilization will not penetrate this film. If a sample is going to be tested periodically, closing the bag in the regular manner will be sufficient. However, if the bag will be kept closed for an extended period, then a heat sealer can be used to give the bag a permanent seal.

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.