Sold here are white smooth urea plastic caps with F217 Triseal liners. Urea also known as UF plastic is durable and provides a smooth, glossy finish that pairs well with matching plastic jars for housing various cosmetics or body care products. The F217 foam liners provide excellent chemical resistance to acids, alkalis, solvents, alcohol, oil, household cosmetics, and aqueous products. They also offer low moisture transmission rates, odor resistance, and do not alter product taste. These white plastic caps are compatible with the 3 oz clear polystyrene jars, stock #650000.