The TOWA Bobbin Tension Gauge is designed for mid-arm and longarm machines. Measures bobbin thread tension for ideal stitch quality. Recommended settings are available on our Tension Guides for Longarm Machines. The TOWA Bobbin Tension Gauge makes it very easy to adjust bobbin tension by giving a numerical range to how tight or loose the tension is in a bobbin case. L bobbin for small bobbin and M for large bobbin.
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