Bobbins Pre Wound, Madeira Black "Class 15" 50 pk #20990053 SIOC The SAI has built-in sensors

The SAI has built-in sensors that detect thread breakage in any of the eight upper threads as well as the bobbin thread

Use the speed control slider to adjust the speed from low to medium to high for precise sewing at a speed you are comfortable with

Marine Magic

Support Table

M Frame Starter Kit

Bobbins Pre Wound, Madeira Black "Class 15" 50 pk #20990053 SIOC The SAI has built-in sensorsWhether your machine has the ability to wind bobbins or not, you'll love time saving practicality and efficiency of pre wound bobbins. This 50 pack of Class 15 bobbins work perfectly to fast track your projects for non stop sewing. Not only are these bobbins ready to use out of the box but their wound with the quality and longevity of Madeira Thread.