72h Heat Packs
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These unique warmers were designed specially for shipping fish, reptiles and other small animals. They are used worldwide. The UniHeat 72 Hour Heat Pack will warm up and is ready to use within 3-5 minute of being exposed to the air, no kneading or shaking required. One heat pack will increase the temperature of a 1cu. ft. box by 20 degrees, for every additional heat pack that you use the temperature will raise an additional 10 degrees.