There are three versions of the wide irons and they all look the same:
They are all fitted with either 70ohm or 160ohm heaters that are the same size as the ones used in the normal width irons. You cannot tell what heater resistance they use without taking the irons apart and checking!
The 1.0 and 1.1 models have a heater and thermal fuse wired in series on both sides. We sell a heater and thermistor combo suitable for these models:
The 1.2 model is the current model. Some of them have the heaters and thermal fuses in series like the 1.0 and 1.1 models (and therefore use the spare parts linked to above), however others have them separate and only have a thermal fuse on the switch side. If you have 1.2 model with a separate thermal fuse, then theses are the heater spare parts you need: