Motor Brush Cap, 1/2"
These are original Singer brush caps made of Bakelite.
Measures about 1/2" across the bottom and fits the white/green Singer 221, The UK 221 and 222 with original 230V motors, and a few others.
It will not fit the USA made 221's with the smaller 3/8" brush caps.
If you are not sure it will fit your machine contact us for fit confirmation.