The Weller 0052702899 WHP80 Preheating Plate can be connected to any Weller power supply 80 watts or greater. It is used to slowly increase the temperature of a PC board prior to rework to minimize the risk of damaging sensitive components. Heating surface measures 80mm x 50mm (3.15" x 1.97"). Temperature range is 150°F to 850°F. Unit is ESD-safe and compatible with lead-free solders.