circuit board parts (without copper pipes, fans, etc.) This induction heating circuit uses a 12-55V low-voltage DC power supply, with a maximum input current of 50A and a maximum power of 3000W.It can be used for DIY players to do quenching, annealing and other heat treatments for small parts, andit can also be used with crucibles to smelt gold, silver, copper, aluminum, lead, tin and other metals. This circuit can directly heat iron, carbon steel, and other materials containing magnetic materials, but the spiral spring cannot heat it.This product does not include a power supply and needs to be purchased separately. It is recommended to buy a communication power supply. The test result uses for R4850S1 communication power supply. circuit board size:length 18.8 cm x width 10.7 cm x height 5.6 cmfinished circuit board weight (without heating copper Tube): about 720 grams. Shell size: 19.7 x 12.6 x 6.4CMCopper tube weight:Copper tube inner diameter: 40 mm.Copper tube turns:Voltage12Vheating effect isnot recommended, 24V or above is recommended, otherwise the heating speed is slow24V. Use crucible to melt lead and36V to use crucible to melt aluminum.48V use crucible to melt gold, silver, copper<br><br>Use a 48V 50A power supply to heat a screwdriver with a diameter of 6 mm to burn red in about 5 seconds. Heat a wrench handle with a width of 2.3cm and a thickness of 0.7cm, and it burn red in about 11 seconds. Finished circuit board + copper tube In places with high current, the wiring is very thick, and the window is opened and tinned. After soldering, you need to spread tin or solder the thick copper wire It's DIY kits, needs to finish by yourself. Color: As Shown Material: Plastic+Metal<br><br>Package Contents: 1 set * DIY circuit board parts(Without copper tube and fan)<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.