The L262 is a white PP plastic 120mm triple thread lid with F217 liner. This closure includes an F217 foam liner, which will create an airtight seal when the lid is securely screwed on to the container. This lid is made of polypropylene (PP), which means it has a high heat tolerance level and an excellent resistance to fatigue. This closure fits a container with a 120mm opening. Please read 5 seals and how they make perfect liners for your container for more information on liner types.