Compatible with two types of Mason jars: Our Mason jar vacuum sealer is BPA-free, food-safe, and does not alter the taste of your food. It easily seals jars of various sizes. Mason jars are not included. Hands-free: Say goodbye to manual vacuum sealing and bulky accessories. With our electric Mason jar vacuum sealer, you can easily seal your jars with just one hand, leaving the other free to hold the jar. This innovative product is ideal for busy home cooks, saving time and decluttering the kitchen. Preserve your food: Our vacuum sealer creates a vacuum environment that effectively preserves the flavor, nutrients, and freshness of your food, ensuring its food safety. It is also dishwasher safe. It includes two sealing rings of different sizes: one for standard mouth Mason jars (68 mm) and one for wide mouth jars (84 mm). It eliminates odors and moisture. Whether you're making homemade jams and sauces or preserving meats, our vacuum sealer is an essential tool for any home cook.