Silica Gel Can 40 Grams - Desiccant silica gel absorbs moisture and prevents condensation from forming inside a case in high-humidity climates. Crystals change color to green once fully saturated and can be easily recharged in the oven. One charge typically lasts 3-6 months under normal conditions. Silica Gel Can 40 Grams Measures 4.1" x 2.2" Individually packaged Ships pre-loaded with gels Imported