Each spool has a length of 5000M (5500Y). It can be used for a long time for embroidery and sewing. High tenacity polyester filament 70D/2 polyester thread embroidery machine bobbin thread reduces friction and static load from start to finish. Choose empty plastic can with storage box from us, to enjoy the fun of filling your own pre-rewind can wire (see photo no. 2) Choose plastic thread holder from us, to help support the huge spool of polyester bobbin yarn running smoothly on your machine. New Brothread enormous spool of polyester thread embroidery machine bobbin (embroidery bob): 100% quality guarantee. !