... ,it has a light surface,catch only by one hand,good quality and treatment,use for many years.It ... use lighter to ignition,first must touch catalyst about ten second.One cup of oil can be work about 12 ... .when weather being cold.Medical treatment: cure women dysmenorrheal,hand&feet cold, arthrosis,etc.Product characteristic:good quality,green ... into clothbag when use over. sell no.006 steel hand warmer