Replacement bobbin winder rubber, 
Color: black
Size: medium size
Outside diameter: approx. 1" 1/8
Inside diameter: approx. 5/8"
Crafts: sewing + quilting
Very flexible bobbin winder friction wheel.
Fits for Singer 66, 99, 201, 15, 301, 401, 403, 404 and many different models snd makes