The L451 is a yellow PP plastic 48-485 smooth skirt 5-hole flip top sifter spice lid with heat induction seal (HIS) liner. This flip top sifter spice lid has a hinged closure and five holes. This lid is intended for more coarsely ground spices. This closure is ideal for spices and seasonings. This closure comes with a heat induction seal (HIS) liner, already placed inside the lid. An HIS liner is a metallic disk that provides an airtight, tamper-evident hermetic seal when an appropriate heat induction sealing process is applied. This liner can work with plastic or glass containers. For more information on heat induction sealing and available machinery, please read our article, How to use HIS liners and a heat induction sealing machine. 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 48-485 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.