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We present the unparalleled Bobbin Case with Internal Spring, an essential component for conventional industrial straight sewing machines, compatible with renowned brands such as Alpha, Brother, Sansei, Singer, Siruba, Juki, Gemsy, Jack, Lanmax, among others.

Our Original Jack Bobbin Case, designed specifically for the F4, A2, A3, A4, A4E, A5, A5E and A6F models, is the ultimate choice for those seeking quality, durability and superior performance. Every detail is carefully crafted to ensure precision and reliability during sewing, contributing to impeccable results with every stitch.

The small bobbin case offers convenience without sacrificing efficiency. The internal spring provides smooth, constant thread control, ensuring even feeding and avoiding unnecessary interruptions. Easy installation and removal makes the replacement process quick and hassle-free, keeping your production moving.

With high-quality materials and a durable design, our Bobbin Case is designed to withstand intensive use, providing a long service life and minimizing the need for constant maintenance. Whether for professional sewers or clothing industries, trust the excellence of the Bobbin Case with Internal Spring to enhance the performance of your industrial sewing machines. Sew with confidence, sew with quality, choose the Original Jack Bobbin Case.