The Le Parfait Super rubber seals are specially fitted for the Le Parfait Super Jars and Terrines. They are reusable for everyday storage and can also be used for your fruit and vegetable preserves as well as for savory dishes, meats or casseroles. Le Parfait recommends using a new rubber seal for each canning event to ensure vacuum seal effectiveness. Available in three sizes, please refer to the size charts here to determine the specific jars that each size fits. The wholesale carton contains 10 retail ready packs, each retail pack includes 8 rubber seals. Le Parfait - Preserving What's Best