Collapsible Hinge Lid for Joule Sous Vide, Designed to snugly mount ChefSteps Joule sous vide cookers to 12,18,22 Qt Rubbermaid sous vide containers. It DOES NOT fit Anova. Diameter of the hole is 1.87in \/ 47.6mm\r\n \tMininum Water Evaporation and Heat Loss, Cook long time even over night without having to refill water. Only the lid is included.\r\n \tPatent Pending Design, with the mount holes at the corner where the water flow is optimized for heat transfer\r\n \tPerfect Access to Foods, Patent pending structure of the lid is collapsible while cooking, able to add or remove foods in the water bath any time. Hinge is durable after 100,000 uses\r\n \tFlexible BPA free plastic lid clamps vacuum sealed bags to the container firmly to avoid bags from swimming in the bath.