Are you missing a timer button on your cooker? If you are, then this is likely to affect the control that you have over your cooker. To resolve this issue, these universal cooker knobs are a high quality alternative product for your cooker timer.
Despite these universal cooker knobs being suitable for most cookers, we recommend that you check that your appliance is compatible with this spare part before purchasing it. They are 23.8mm so you should be able to compare them with your old timer button to see if they are the same as the originals.