Bobbin Threading and Tensioning
4 PCS Sewing Machine Bobbin Case for Most Home Sewing Machine DIY
This Original Singer Bobbin Case (Part #172082) is compatible with Models 401, 401a, 403, 403a, 404, 431G, 500, 500a, 503, and 503a.
Original Singer Bobbin Case Fits Models 401, 403, 404, 500, 503
Bobbin Case Adjusting Screw
Replacement Embroidery Machine Bobbin Case. Compatible for nearly
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