Prewound bobbin, card board, size L, white color, 144pcs per box, 75D/2 Polyester, Doublelin,For Babylock, Barudan, Bernina, Brother, Consew, Doublelin, Juki, Mitsubishi, Singer, Tajima and many more Super Quality Prewound Bobbin For some models of Babylock, Barudan, Bernina, Brother, Consew, Doublelin, Juki, Mitsubishi, Singer, Tajima and many more, IF YOUR MODEL IS NOT LISTED BELOW, PLEASE CHECK WITH US IF THIS SIZE OF BOBBIN IS SUITABLE WITH YOUR MACHINE OR NOT Card Board, Size L standard bobbin. If you can not make sure if your machine using this size bobbin or not, please check with us 75D/2 polyester, 130 yards This is weight 60 polyester thread, if you use cotton thread or other weight polyester thread before. You need to adjust the tension screw on your bobbin case to get the correct bobbin tension just at your first time to use this bobbin