HICTOP 3MM MK3 Aluminum Heated Bed Hot Bed PCB Heatbed Platform for Reprap 3D Printer 200W 12V + Wiring No soldering required, safe and convenient Aluminum plate Dimensions: 275mm x 220mm x 3mm Power wiring is included in the kit Compatible with most Prusa i3 variations of 12V power supply, we have 24V bed listing for 24V power supply as well.