- copper and gold for grain manger furnaceSpecification: 7.9 cm long 19 cm high 9.4 cm wide weighs 3.1 kg.This fine copper furnace, abdomen is fine gold, for diagram of grain, silver inlay, body manger, on both sides of the halberd ear, out the four light foot, at the bottom of the KeKuan barbary "stone", chisel carved exquisitely patterned, knife sharp and leather case prospective, four for good.