This 450-gram unit protects 33 cubic feet of enclosed space from the effects of humid air. The silica gel crystals extract the moisture in the air, protecting stamps and coins from the harmful effects of humidity. Indicator window shows when the unit needs to be re-activated in the oven per the enclosed instructions. Unit can be re-activated indefinitely.

Dimensions: 4 1/2" x 2 1/8" x 6 3/4"

Also available in a smaller size for compact storage spaces:
Dehumidifying Silica Gel - 40 gram

Item Subjects: Anti-Corrosion Stamp Supplies, Anti-Corrosion Supplies, Coin Supplies on Clearance