Now you can use your heirloom canning jars again with these newly available replacement rubber rings. Natural rubber sealing rings fit Ball, Corona, Jewel, Crown, and Gem jars.Designed for wide-mouth glass canning jars with a glass lid and metal wire bale. Boxed in a pack of 12 rubber rings. Orange/red in color . Each replacement rubber ring has one protruding tab which will allow you to break the vacuum seal easier when removing the lid from the jar. Overall dimensions: 3-5/8"OD, 2-15/16"ID, Thickness: 5/64" . Made in Sri Lanka.