Buck Converter 12v to 5v, DROK 5A USB Voltage Regulator DC 9V-36V Step Down to DC 5V-5.3V 5.2V 3.5-6A Volt Transformer Power Supply Module for Phone Fast Charging
DROK buck converter input voltage is DC 9v-36v, output voltage is 5.2V (5V-5.3V available according to your input voltage).
BIQU H2 Direct Extruder Upgrade for BIQU BX 3D Printer, High Extrusion Force Multi-Gear Transmission Not Easy to Block Light Weight Can Be Used with Ender Series and CR Series 3D Printers
【Retaining the Advantages of Short-range Extrusion】H2 direct extruder has more accurate control of the feed rate and more accurate withdrawal than remote extrusion; the torque requirement of the extrusion stepping motor is relatively lower.