Instant heating pad

Instant heating pad
Instant heating pad has many names, such as Heating pad, Heat Packs, Warmer pack, Instant Heating, Disposable Body Warmer
What’s instant heating pad?
The details are as follows:
Specifications:
Size: 130X100mm 
Weight: 48g
Heating Last: 12hours
Average Temp: 52C 
Max Temp: 62C 
Country of Origin: China

Material: Iron Powder, Water, Vermiculite, Activated Carbon and Salt.etc

Shelf Life: 3years
Storage: Keep in dry, cool place and avoid direct sunlight
Its features: All natural ingredients
Air Activated
No batteries, no microwaves, no fuels