A dummy-load is a useful item to have when you need to test a transmitter without radiating a signal. This design uses a number of resistors dipped in oil to form a 50-ohm load that can take 108-watts "as is". The addition of oil as a coolant allows the resistors to handle around twice their rated power for short periods, typically on a 1:1 On/Off ratio.
For a little more than a 30-watt oversize PL259, you can have a robust unit that will take more than 100w all day long.
Each unit is individually tested and a calibration sticker attached.
(details+specs subject to change)