This Egostat Thermostat includes a knob and is a direct replacement for the latest type Aga range cooker Diamond H thermostat or earlier Ranco stat. The probe length is about 60mm x 2mm thick. There are 2 male spade connections into ceramic body. Note the silver wire to the probe. This is important as the the earlier version had a copper probe. See here.
They are DIFFERENT to the Ranco stat - the probe is thinner and a different material. The Egostat will fit in place of the Ranco and uses the same wires and mounting bracket. The locking ranco NUT fits the Egostat shaft. Fitting is actually EASIER as the bulb end is smaller and shorter. Also the AGA TOP does NOT have to be lifted to fit it.
Ranco stat probe length 1400mm.
Egostat probe length 1500mm.
Wire connections - same 2 spade male.