These unique warmers were designed specifically for shipping fish and corals. Wholesalers and fish exporters use them worldwide. The UniHeat Tropical Fish Warmer will warm up and is ready to use within 3 to 5 minutes of being exposed to air. No kneading or shaking is required. One heat pack will increase the temperature of a 1 cu. ft. box by 20 degrees. For every additional heat pack used, the temperature will raise an additional 10 degrees. Each heat pack will last more than 20 hours and is environmentally safe, disposable and the inner contents are biodegradable.

20 HOUR HEAT PACK 5.5" x 4" 240 / CASE
40 HOUR HEAT PACK 5.5" x 4" 240 / CASE