This Anti-Tarnish Strips neutralize tarnish-causing sulfur gases inside enclosed storage or display areas. This keeps all sterling silver shining and ready for immediate use for six full months. This is totally safe, do not emit any gases, and are non-toxic. There are 8 strips in one pack. Each strip provides protection for one cubic foot of space, and the strips can be cut for any size application. We at Dreamland Jewelry HIGHLY recommend these Anti-Tarnish Strips from Hagerty. We've been using these anti-tarnish strips for a long time and can tell you that they truly work! These are really a must-have for anyone who owns a lot of silver jewelry, or anyone who makes or sells jewelry. You can use them in jewelry boxes, display cases, ziplock bags, or any other enclosed enclosed area. Give them a shot. We LOVE this product and know you will too. Its well worth the small cost.