These TIN6 sized silver metal rolled edge covers in bulk are compatible with 4 oz flat metal tin containers sold separately. Tin-plated steel is highly durable and offers many benefits, such as increased product shelf life and barriers against water, odors, gases, and light. Rolled edge covers have no sharp points for safe use and can be used for a range of products when matched with metal containers that could include solid perfume, cosmetics, and more.