Pull off the knob from the stove and check the shaft (the fixture of the knob). See which illustration and photo below represent the shaft position.

If you are not sure, we can check it for you.

CHECK ICON LEFT
LEFT illustration

The stove shaft protrudes from the stove.

SHAFT extended out
CHECK ICON LEFT
Middle Illustration

The shaft is inside a round hole which is larger than 16mm diameter.

SHAFT
X ICON
Right Illustration

The shaft is inside a round hole which is smaller than 16mm diameter.

SHAFT

NOT SUPPORTED