1.With ISO,CE,SGS ect 2.Inner Size:10x13cm 3.Heating duration:12hs 4.Hand warmer Hand warmer With SGS, FDA, and ISO 2009 certification The biggest manufacture for natural heat products TypeInner bagMax.TemperatureAve.TemperatureHeating durationWeightQuantity/CTNhand warmer130*100mm63.C53.C12hs50g240pcs/CTNIngredients: Iron powder, water, activated carbon, cellulose, salt and catalyst.Out package: ...