Weber Charcoal Heat Controller for 22” kettle grills includes a cone and diffuser ring, allowing you to cook low-and-slow for up to 7 hours or achieve high-heat searing. The diffuser ring ensures even heat across the entire cooking surface, while the cone provides direct or convection heat for crispy wings, meats, and vegetables. It also accommodates a water pan for added moisture and can be easily stored by disassembling the diffuser.