Description from Rio Grande
Protect your jewelry from tarnish with Silver-Guard™ Anti-Tarnish blocks. The blocks absorb and neutralize the sulfide vapors in an enclosed environment, eliminating the risk of tarnish. Their small size allows them to be placed discreetly inside display cases. Each block protects an enclosed area of about 10 cubic feet for 3–6 months. Unopened packages have a 12-14 month shelf life.
- Dimensions : 2″W x 1″D x 3/8″H
- Country of origin : United States