Corrugated carton has a built-in indicator that turns from blue to pink to signal when to reactivate. Reactivates easily in a conventional oven. Ideal for small safes, display cabinets, etc. Protects 15 cubic feet of enclosed space. Hydrosorbent Dehumidifiers#: SG-200. Size: 3.5x2x4.5. Color: N/A. Sold Individually. Case Qty: 48 .