UNIVERSAL SIZE: The inner diameter of each jar seals replacement is 7 cm and the outer diameter is 9.7 cm, suitable for most wide mouth jars with a capacity of 0.35L-2L. GOOD SEALING: Good airtightness and sealing enable the mason jar seals to maintain the freshness and cleanliness of fruits, vegetables, jams, and sauces for a long time. PREMIUM MATERIAL: The rubber jar seals are made of premium food grade rubber, which are soft and durable, and are not easy to deform or broken due to stretching. EASY TO USE: The mason jar rubber seal replacement is soft enough to be slightly stretched to wrap and secure it inside the can lid, effectively avoid air from entering and keeping the food fresh. WIDE APPLICATION: These glass jar rubber seals are compatible with most types of glass jars, food storage containers, mason jars, and other container types, making them perfect for kitchen use.