Premium Bobbins Box Case with 30 Premium Style SA156 Bobbins Organizer Size A Prewound Bobbins Made for ALL Brother Sewing Machines Bobbin Organizer Box with Size A 30 Prewound Bobbins White (Style A - SA156) High Density Foam Insert will hold all your bobbins for sewing / quilting / embroidery / serger without letting them unwind, fall or mingle with other bobbins. High Quality NO LINT Filament Polyester thread 60wt. Plastic Sided bobbins great for Embroidery Machines. Great for carrying your bobbins to your Sewing / Embroidery Class without they unwinding and getting entangled with other threads. Will Fit all Sizes of Bobbins including Brother, Baby Lock, Viking, Elna, Janome, Kenmore etc. sewing machines Machines