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AP1931 - $2.47
Each mini-mini heater hand warmer packet contains iron, water, cellulose, vermiculite, activated carbon and salt. When taken out of its sealed pouch, the iron will immediately oxidize and generate heat. This “heat source” will last up to seven or more...
AP1933 - $8.10
A vinyl pouch contains a supersaturated solution of sodium acetate. When pressure is applied to a metal activator, a seed crystal forms in the solution which triggers the entire solution to crystallize. As the solution changes physical state (liquid...
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