This is a one gang intermediate light switch with a polished brass switch on a flat polished brass plate.
This is an intermediate light switch. Do you need an intermediate light switch?
You only need it if you have three or more light switches controlling one light. In which case the middle one(s) need to be intermediate.
The two end ones need to be two way light switches.
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Please don't forget, you will need a 25mm back box to fit this plate.