Threadart glow in the dark thread is great for special projects embroidery. Each spool is 1000m (1100 yds) of 30 weight 150/2 thread. Perfect for machine embroidery. Will glow for hours after being exposed to light. Makes really great designs for Halloween projects and any item you will use in the dark. Works in all commercial and home embroidery machines and is 30 weight. Perfect for costumes.Threadart glow in the dark thread is great for special projects embroidery. Each spool is 1000m (1100 yds) of 30 weight 150/2 thread. Each color will glow in a hue similar to the original when exposed to light.Perfect for machine embroidery. Will glow for hours after being exposed to light. 30 weight thread.Makes really great designs for Halloween projects and any item you will use in the dark.Works in all commercial and home embroidery machines and is 30 weight. Perfect for costumes.Threadart glow in the dark thread is ideal for Halloween, birthdays, and all theme parties. Very popular to embroider on joggers gear and for trick-or-treater costumes.Threadart Glow In The Dark Machine Embroidery Thread | 1000M Cones Compatible with Brother Janome Pfaff Babylock Singer Bernina Husqvarna and Most Home Embroidery Machines | Yellow