Quantity   Component name
1 × PSU 24 Volts 20 Amps 480 Watts PSU 24 Volts one power supplyPSU I use is the 24 Volts 20 Amps 480 Watts model eBay Seller delhanway2009
1 × Step Down 24 Volts to 12 Volts New 24V to 12V DC-DC 30A Car Power Supply Inverter Converter Conversion Device, 24 Volt PSU supply to 12 Volts for the RAMPS controller. eBay Seller delhanway2009
1 × Solid State Relay, DC swithing is a must Solid State Relay toDC to DC Single Phase Solid State Relay SSR 25A 3-32V 5-220V conntrol the 24 Volts 300 Watt heatpad via the RAMPSD 1.4 eBay Seller: keril13
1 × RAMPS 1.4 with 12864 LCD/controller RAMPS 1.4, 12864 LCD/controller, Arduino Mega 2560 and drivers, etc.. eBay Seller accessoriesdepot
1 × Heat bed custom built 275mm x 225mm 24 Volts 300 Watts The Heat bed custom built 275mm x 225mm 24 Volts 300 Watts eBay Seller, very helpful, keenovo