These jar seals from Kilner come in a 12 pack. The jar seals are made up of 2 pieces; a replaceable vacuum seal and a metal screw band to secure the seal to your jar. To ensure you get the correct freshness the vacuum seal should be replaced after each use. Preserving Jar Seals FeaturesKilner sealsDesigned to suit the 0.5 litres and the 1 litre Kilner jarsDiameter- 70mm12 packKilner\'s Ref.MPN: 0025.399Sizes: Fits 0.5/1 litre Kilner Jar\'s (12 pack)PM Ref. 865888