Specifications:Widely used in precision instruments, leather, shoes, clothing, food, medicines and household appliances.Can be used to protect the camera, lens, microscopes, telescopes, audio & video equipment, records, tapes, video tapes and computer diskettes, etc. Keeps them from mildew.The silica gel desiccant will turn to other color when it absorbed moisture from the air. You can heat it in microwave to 100 - 120 for about 10 - 30 minutes, color will slowly change back after reactivation.Type: DesiccantMaterial: Silica Gel, Flexible PlasticQuantity: 1 PcFeatures: Portable, Reusable, Color Changing, DryerSize: 60mm x 55mm x 22mm/2.36" x 2.17" x 0.87" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Included:1 Box of Desiccant