60 colors embroidery thread kit. Using a color chart to find similar Brother color No. and name the Conversion chart of Madeira is also available. Each Spool has a 40wt and 500m (550yd) length ideal for all home-based embroidery machines. High tensile lower risks of breaking or fraying. Holds up colors well even when subjected to commercial laundering bleaching and other harsh chemicals. High quality plastic storage box is sturdy and compact rarely gets broken during transportation.