Copper warm hand warmer, "Zhang qi" model6 CM long and 9.7 CM wide and 8.5 high CM516 gramsThis warm hand warmer for refined copper is made, the shape of neat and elegant, sedate austere.Deep color, pure jade patina inside collect, jose calm and natural transition.Furnace cover tightly with shaft without the gap, the shoulder double girder system cohesion, and convenient in hand.Furnace cover adopts hollow-out techniques.At the bottom of the inscription "Zhang qi system".