The L071WH is a white PP plastic 20-400 lid with LDPE polycone liner. This cap comes with a polycone liner, a built-in LDPE, natural-colored conical-shaped liner that provides a tight seal. This lid is made of polypropylene (PP), which means it has a high heat tolerance level and an excellent resistance to fatigue. Made in China. This closure fits a container with a 20-400 neck finish. The first number refers to the diameter of the container's opening (in mm). The second number refers to the thread/style/depth of the closure's skirt. Please read 5 seals and how they make perfect liners for your container for more information on liner types.