Model No Quantity 2 piece(s) per pack Color Blue Material Plastic Specification 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 mildew; Can be used to protect the camera lens microscopes telescopes audio and video equipment records tapes video tapes and computer diskettes etc in order to prevent mildew; You can reuse your used silica gel with Microwave; Heat in microwave just 5~8min. (Medium / low power) color will slowly change back to blue after reactivation. Packing List 2 x Boxes of desiccant