20 Prewound 90 Weight Black & White Thread Embroidery Bobbins Size A Class 15 Style 15J For Brother Baby Lock SA156 90 Weight Bobbin Thread Is The Recommended Thread Weight for Brother & Baby Lock Embroidery-Only Machines Including Brother PE700, PE700II, PE750, PE770,PE780D, PE500, PE540D, VE2200, SB7050, SB7900E, PE525, NQ1400E 10 White & 10 Black Color Thread Bobbins are included, 95 Yards per bobbin, 100 % Polyester Same size as Brother SA156 & Baby Lock BLG-BOB embroidery bobbins Plastic Sided bobbins are recognized by Thread Sensors and are reusable