The Fabri-Kal PolyPro Microwavable Deli Container Lids, these lids are designed with a standardized diameter that ensures universal compatibility with all Fabri-Kal Microwavable Deli Containers. It has a snap-fit design ensures secure, leak-resistant transport. This clear design makes it easier to view the product inside. These container lids are microwave-safe polyethylene that can withstand temperatures of up to 240°F.