【Wide range of uses】 70mm standard - caliber design, which fits perfectly with Ball, Kerr and other mainstream brands of regular mouth Mason jars. It’s easy to replace the old canning lids. Includes removable canning labels for added convenience in daily storage and canning projects (9 lids + 12 rings + 30 labels).【Sealed and Leak-proof】 Designed with silicone grooves and paired with a sealing silicone ring for better leakage prevention, the sealing silicone ring is removable, easy to use and clean, which makes cleaning and maintenance simpler and more efficient.【Durable and Long-lasting】Unlike metal lids, the plastic Mason jar lids won’t rust or affect the flavor of food and beverages stored in Mason jars. The material used is sufficiently thickened and hardened, anti - scratch, abrasion - resistant, easy to clean and reusable.【Colorful Design】 A set of 9 colorful Mason jar lids adds vibrancy to the storage jars. They are easy to categorize and label, whether for kitchen storage or party decorations, and are simple to handle.【Safe Material】Made of high - quality PP material, it’s environmentally friendly and odorless. It doesn’t contain BPA or other harmful substances, and is safe and secure when in contact with food, so families can store items with more peace of mind. Product description