COMPATIBILITY: Designed to fit Presto pressure canner models CA16, CA16H, and 21-quart sizes, ensuring a perfect seal for safe pressure cooking DUAL PACK: Includes two replacement sealing rings, providing excellent value and extending the life of your pressure canner AUTHENTIC FIT: Precise dimensions match the original 1075 09907 specifications for reliable performance and proper sealing INTEGRATED DESIGN: Features built-in automatic air vent (9911) for enhanced safety and pressure regulation ESSENTIAL MAINTENANCE: Regular replacement of sealing rings helps maintain optimal pressure levels and ensures proper canning results Keep your pressure canner working efficiently with this essential 2-pack of sealing rings designed specifically for Presto pressure canners. These replacement rings are precisely engineered to fit Presto models CA16, CA16H, and 21-quart pressure canners, ensuring a proper seal during the canning process. Each ring comes with an automatic air vent (9911), a crucial component for safe pressure canning. The sealing ring maintains the necessary pressure levels for effective food preservation, while the air vent helps regulate pressure release. Regular replacement of these parts helps maintain your canner's optimal performance and safety. These genuine replacement parts are designed to match the exact specifications of your Presto canner, providing a reliable seal for all your home canning projects. Keep your pressure canner in top condition with these essential maintenance components.