120 m (132 yds) Art no. 9766 100% polyester 50 spools per box
No winding from large cones! Prewound bobbins are practical, always ready to use and have the same amount of thread on each bobbin, which means all bobbins can be changed at the same time without wastage.
Available in colour black and white
Guidelines for Underthread use: For standard length stitches the general rule for underthread requirement is around 3 m per 1000 stitches. Upper thread: You can expect approximately 5 m per 1000 stitches. Correct thread tension: A perfectly tensioned embroidery with standard length stitches should have around one third of the underthread visible on the stitches underneath!