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Nonwoven Paper Packaging Material-The silica gel desiccant packets are three-side sealing constructed with high quality patented Verna non-woven fabric material. This packaging material has good breath-ability, dust-proof functionality, strong strength and seal strength. White Silica Gel Beads & Package Includes-Silica gel packs utilize premium quality and reusable raw material. Desiccant Packs are cobalt chloride-free, non-toxic, non-hazardous and DMF-free. Silica gel raw is stable both physically and chemically. It is not combustible or corrosive. 15pcs 20 Gram Silica Gel Packs. Product dimensions of each packet: 2.36″ x 4.1″. Strong Moisture Absorption Ability-the silica gel can protect up to 120 cubic inch each One grams of any enclosed storage space such as safe, ammo cans, ammo boxes, tool box, 3d printer filament sealed plastic storage box, weapon case, closet, etc. Widely Used-The silica gel desiccant packets provide a better solution keep moisture from guns, important papers, legal papers, collectibles, books, jewelry, photo album, shoes, camera lens, toys, leather clothing, ammo. photo equipment,etc. This type of desiccant is also widely used in mental processing, machine manufacturing, electric manufacturing & clothing industries for moisture prevent and proper storage. How to Reactivation: Please pay attention, the silica gel packs can not be heated directly due to Verna Paper Packaging low melting points. You can cut open the packet then place silica gel beads on a shallow dish or backing sheet to heat to reactivate: Oven: 0.5 – 2 hours at 200 – 250F. Microwave: DEFROST Packets for 7-12 minutes. Then place the silica gel beads in muslin bags to reuse.