1pc Silica Gel Desiccant Humidity Moisture For Absorb Box Reusable brand new and high quality Widely used in precision instruments, leather, shoes, clothing, food, medicines and household appliances. Can be placed in closets, coat or sweater inside the box to prevent , etc. Can be used to protect the camera, lens, microscopes, telescopes, and video equipment, records, tapes, video tapes and computer diskettes, etc., in order to prevent . With moisture after the red color change from blue features. You can reuse your used silica gel with Microwave. Heat in microwave just 5 min. (Medium / low power), Color will slowly change back to blue after reactivation. Size: 5.5cm x 6cm x 2.2cm. Quantity: 1pc