Machine Embroidery Thread Set - 80 Colors of Polyester on 500M Spools - Sets C&D - ThreadArt This kit includes 80 pre-selected cones of 500 meter polyester thread in brilliant and vivid colors. The spools will fit in almost all home embroidery machines including the Brother cartridge style thread holders. A great extension set for the experience embroiderer with great colors for nature, holiday and neutral designs Spool design for this set includes snap style thread holder on bottom of spool.