CleverDelights 144 Black Prewound Bobbins - 60wt - Size A Class 15 Bobbins - SA156 Replacement - For Brother Embroidery Machines - 7/16" x 13/16" 60 Weight - 100% Polyester High Tenacity Bobbin Thread - Black Thread Size A Bobbins - 7/16" x 13/16" Works perfectly with most Brother embroidery machines including SE400, SE425, PE770, PE-780D, LB-6800PRW -- See product description for full compatibility list Perfect replacement for model SA156 (XA5539-151) bobbins CleverDelights brand