421325 002

Singer Genuine Apollo Bobbin Case - (421325-002) - (421326)

Singer Genuine Apollo Bobbin Case - (421325-002) - (421326). The bobbin case is the part of the sewing machine that the bobbin is inserted into, that holds the tension of the bobbin thread. Tension is adjustable via a screw on the side of the bobbin case. Be sure to use the bobbins that are specifically design... - Singer Genuine Apollo Bobbin Case - (421325-002) - (421326).