For Singer model 12 and 13 and most other transverse shuttle machines requiring a thin round shank. This listing is for 10 needles. Comes with directions about setting the needle when your vintage machine has no needle stop.
Needle length from top to eye is 35.3 mm
Shank diameter is 1.28 mm
These are new modern manufactured needles 46x1, not old stock, these are high quality. They are a good substitute for many machines using 12x1 needles. If your machine has a needle stop these may be too long. Many people have used these successfully on their machines.