ZVS high frequency induction heating machine for quenching, smelting, and heat treatment of small parts Input voltage range of 18 to 55V DC with short term maximum power of 1300W for DIY applications Works with graphite crucible to melt gold, silver, copper, aluminum, lead, and tin in workshop Directly heats iron, carbon steel, graphite and magnetic materials without heating spiral springs Heating plate PCB size of 10 by 10cm with height of 8.5cm and coil inner diameter of 50mm