The gold PP plastic caps are available in a variety of sizes and come with PE (F217) liners. The PE liner is a good general-purpose liner material. It has a broad application base and chemical resistance making it a good choice for many acids, alkalis, solvents, alcohols, oils, household cosmetics, and aqueous products. The polypropylene F217 lined closures are also ribbed for a better grip when twisting the cap on and off.
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