See if this works with your machine
Brother embroidery bobbin thread. This white (not available in black) thread is 90 weight, 1200yds (1100m). It is specially gauged for Brother and Baby Lock embroidery only machines. It's strong, smooth, and perfectly balanced for size 12/80 and 14/90 embroidery needles.
Part Number: BRO EBTPE5
Guaranteed to fit because it is a part.