Up for sale is 3 bobbin winder rings. This is the most used size (Medium). The inside diameter is about 5/8" and the out side is 1 1/8". Triple A Quality, Unlike other belts that will not last long or harden or crack . Guaranteed  to give you years of service. 

Fits many Singer Vintage Models :

15-series 15 class series ,27,28, 66, 99, 101,127,128, 185, 192K, 201

 301, 301A, 306, 306K, 319, 319K,

401, 401A, 403, 404,

500 ,500A, 501, 50,3 504,

 600 601 604 620 621 640

714,717,719, 724,734, 774,776,

and many more!!

Brother Models:

 1681 ,320,  360,  451,  461,  661 , 681 , 7029 , 741 , 751,  761,  845 ,

LS-1217 , LS-1520, LS-2125 , LS-2720, LS-2820,  LS-2825 ,LS-2920 ,LS2775 ,

 PC5000,  PC6000 , PC7000 ,PC7500 , PC8000 , PC8895,

 PE100 ,PE150,  PE150V,  PE180D ,PE200,

PS1000, PS1200 , PS1700, PS1750,  PS1800 , PS1900 ,PS1950,  PS2100 ,

 VX1010 , VX1011,  VX1020, VX1100,  VX1120 ,VX1125 ,VX1140 ,VX1200,  VX920 , VX940 ,VX950 , VX970 , VX980

, XL1351, XL1561 ,XL1781, Brother XL2010 , XL2015 ,XL2022, XL2025 ,XL2030 ,XL3010 ,XL3022 , XL3025 , XL3027 , XL3030 ,XL3100, XL3200 ,XL4010 , XL4020,  XL4030 , XL4040 , XL4050,  XL4060 ,XL6040 Series ,r XL6050 Series , XL6060 Series ,XL6452 , XL6552 , XL711 , XL781 , XL791,  XL851 ,

XR23 ,XR29 , XR31 , XR33 , XR34 ,XR35, XR37,  XR40 , XR46

and many more Makes and Models!!!

 Order as many sets as you which for the same S&H. Item will ship First Class with Delivery Confirmation .Please e-mail any questions. Thanks