they won't rust. Durable for Use: Incredibly durable offering you with that capacity to preserve reusing them whereas no longer having to any of the high quality. Perfect Color:they are preferrred for that modern appearance that you on your pantry. Tightly Sealed: These lids are the ultimate tight and fully holding covers. They encompass silicon seal making your Jar is tightly sealed. Multi-: Perfect for storing fruits, jams, or colorful candies, storing mushy drinks, tea or coffee, or storing nails, screws and diversified small objects. for traditional large mouth jars. The metal lids are harder than plastic and do not stain. Ergonomic make the screw peak lids clean to open and close. With silicone sealing gasket would seal the jar properly, no leakage problem. They usually are not for canning. These lids are for freezer, dry storage. colour:Silver Material:Stainless steel + silicone size:Diameter: 86mm Package Contents: 8x Jar Lids Only the above package content, other merchandise are not included. Note: Light and various displays could cause the color of the object in the photo barely diversified from the real thing. The measurement allowed error is +/- 1-3cm.