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Tygon is a medical grade plastic, "I.V. cannulas used to transport medications into the body", however as per the manufacturer's instructions it should not be left in place any longer than 72 hours.

BioPlast / Bioflex are a medical grade plastics developed for the body piercing industry which are designed for extended wear with no ill effects to the body.

PTFE Polytetrafluoroethylene, known more commonly as Teflon, is also a medical grade plastic which can be used in body piercing with no ill effects to the body.

TR90 is an extremely durable, flexible and lightweight food-grade and hypoallergenic plastic material usually used in making eyeglass frames.

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10y ago

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