Black phenolic 18-400 lid with PP polycone liner. 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 a 18-400 neck finish. Comes in packs of 100.