Name: safety metal handy warmer Material: metal Model: 006 Good quality with a nice surface. ... hand,good quality and treatment,use for many years.It is normal to use even temperature less than -40 ... oil one time.Safety,no toxic, environmental protection.How to use:1.open the cover of warmer. 2.put ... With a nice surface,easy to carry.Long time to devise,use for many years.Use area is large, suitable ...