40+ Hour Uniheat Shipping Warmer Pack

Uniheat multi-purpose shipping warmer packs are perfect for those colder months. Weight: 3 oz Package Size: 6 1/2" x 5 " x 3/8" Features: • Designed for reliable and steady heat release for 40 plus hours• Simple to use and optimal results with color indicator on the warmer• Excellent on shipping live insects, reptiles, tropical fish, flowers, etc.• Provides an average warmer surface temperature of a 100°F (38°C)