Phase 24 packs are designed to keep shipments between 68 and 75 degrees Fahrenheit. Unlike standard cold packs that change phase at 32F, Phase 24 packs are designed to change phase around 75.2°F (24°C ).

Phase 24 packs function from both a heating and cooling perspective. You can pre-cool the pack to keep shipments cooler, or pre-heat the pack to keep shipments warmer.

Phase 24 packs are extemely popular with amphibian shippers, frog breeders in particular. To maintain a stable internal box temperature, multiple packs are often used in each box.
 

Features:

• Dimensions: 4.25" x 5.5" x 1" 
• Weight: 4 oz
• Reusable 

Please allow 5 to 7 business days for processing and FedEx Ground delivery.

Returns: We guarantee your satisfaction. To get a refund, you must notify us of your dissatisfaction and return the purchased materials within 14 days of your purchase. We will refund the price of your purchased products. You are responsible for the cost of returning those products at standard FedEx Ground rates. Contact us with your order number.