The main components are: iron powder, water, activated carbon, vermiculite, salt and so on.The appearance includes purple, white, yellow, green.
small size：90mm*120mm，weight: 23-27g ,Warm duration：3.5-4.5 hours
big size :100mm*130mm，weight: 28-42g ,Warm duration：4-12 hours
Ten packs, can be boxed or woven bags
