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Plungers can be manufactured out of a wide variety of materials depending on the end application. Precision Polymer Products has experience molding plungers as small those used for a 1cc plunger, up to a 140ml plunger tip. An exciting new avenue for plungers is the use of self-lubricated silicone rubber. This allows the plunger to be used directly without any additional siliconization process. Many of these self lube materials are also approved for medical device use.
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