Smhaen BobbinsLightweight and ergonomically correct, these bobbins feel great in hand. The adjustable tension bar allows you to adjust thread tension with a simple roll of your finger. The bobbins arms move in and out as you spin the tension bar allowing these bobbins to work with a wide variety of thread spool sizes. FEATURES: Ceramic tube Internal tension system Perfectly balanced weight Funnel for easy threading Fit for different spool sizes Ergonomic grips
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