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Tygon tubing. Tygon is a brand name for a family of flexible polymer tubing consisting of a variety of materials to be used across a range of specialized fluid transfer requirements.[1] The specific composition of each type is a trade secret. Some variants have multiple layers of different materials.
It is widely used in the lighting industry for filling bulbs and with combinations of other rare gases for the filling of special bulbs and tubes for special color effects. The welding industry uses argon as a shielding gas to protect metal from oxidation during welding.