Phenolic 18-410 lid with PP polycone liner. This lid is perfect for chemicals, solvents, oils, essential oils, cleaners, fragrance oils, and more. This cap comes with a polycone liner, a built-in polypropylene (PP) natural-colored conical-shaped liner that provides a tight seal. This lid is made of phenolic, an industrial grade, highly rigid, plastic with a good resistance to solvents and high temperatures. This closure fits a container with all our DIN18 neck finish bottles.