12 Narrow (Standard)-Mouth Mason Jar Lids-- Aluminum, Leak-Proof: Includes 12 Narrow (Standard)-Mouth Aluminum Mason Jar Lids With Integrated Leak-Proof Seal. | | Narrow (Standard)-Mouth: Fits All Narrow-Mouth Mason Jars Made By Ball, Kerr And Others. Jars Not Included. | | Food Safe: Food-Safe, Bpa-Free, Integrated Gasket For A Water-Tight, Rust-Free Seal | | Perfect For Pantry: These Lids Are Perfect For Pantry Storage Of Your Bulk Items. Search