Replacement discs can be used on canning jars for a perfect seal. Suitable for canning jars of 0.25L, 0.5L and 1L. The Kilner replacement discs are used in combination with the Kilner screw rings to create a perfect vacuum seal that becomes airtight and leak-proof, so that the contents stay fresh for longer. The inner lid must be replaced before a 2nd soaking.
The 'seal discs' may only be washed by hand.
