63 spools of professional polyester embroidery machine thread in assorted bright colors, each spool with 40 Wt and 500M (550Y) length. Features good tensile strength with lower risks of breaking or fraying, reduced looping and puckering due to elasticity and tenacity. Good color fastness holds up through commercial laundering, bleaching and harsh chemicals. Includes color chart compatible with Brother colors and Madeira conversion chart. Suitable for all embroidery projects.