2 inch x 15 inch size is the 'slide' heater that can mount remotely or under/over control box.
Corded with specific male ends for pressure switch (purple) and heater power (black) to plug into these systems.
Pressure switch is included, as well as union ends and gaskets.
NOTE on install: orientation needs to locate pressure switch box in side or under position when placed horizontally, NOT up at 11-12-1 o'clock position as pressure switch will not see correct pressures.