2 x Arduino NANO: LINK eBay
2 x A4988: LINK eBay
2 x NEMA 17: LINK eBay
1 x lineal potentiometer: LINK eBay
1 x 20x4 LCD i2c module: LINK eBay
6 x push buttons: LINK eBay
1 x toggle switch: LINK eBay
6 x 2k resistor: LINK eBay
1 x diode 1N4001: LINK eBay
2 x 10uF capacitor: LINK eBay
1 x extra DC plug: LINK eBay
1 x 12V DC adaptor: LINK eBay
Wire, soldering iron, solder, etc...