Uniheat 20 Hour Heat Pack - 50 PACK

** Uniheat 20 Hour Heat Pack - 50 PACK **
Lasts up to 20 hours plus!
Ideal for shipping tropical and marine fish.
Continuous warmth for cold weather shipping!
Labor saving, no kneading or shaking required.
With color indicator, easy to set up for maximum results.
Average temperature 70 degrees F, Maximum temp. 110 F setting in standard tropical fish shipping box.
Environmentally safe, disposable, inner contents biodegradable.