Silicone Straw Hole Grommets with Plugs for Mason Jar Lids 40 Pack

Perfect Fit: Designed to fit a 10mm (1cm) hole and reduce it to 8mm, making these grommets ideal for use with straw hole lids.
Wide Compatibility: Suitable for most of our painted metal or stainless steel straw hole lids.
Care Instructions: For tin-plated steel lids, grommets should be removed before washing to prevent water getting trapped and rusting.