Nalgene 2006 Narrow-Mouth Polypropylene Copolymer Sample Bottles with polypropylene screw closure. Ideal for lab applications requiring excellent chemical resistance and autoclaving of containers with or without contents. These polypropylene copolymer bottles are translucent, providing good clarity for viewing contents. Standard serum stoppers can also be used on 30- and 60-mL sizes. NOTE: Before autoclaving, just set cap or closure on top of the container without engaging the threads.
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