About this item Comprehensive Color Selection & Instant Color Conversion: Choose from over 1680 colors in stock, including 170+ vivid shades – ideal for any embroidery project! Use our Simthread color chart (see images #4 and #5) to easily convert between Brother and Madeira systems for the perfect match. Jumbo 5500 Yards / 5000M Spool for Long-Term Projects: Designed for large-scale or continuous embroidery, our 40WT polyester thread delivers smooth performance on both home and commercial embroidery machines. Certified Safety and Quality: Made with 100% polyester and certified by OEKO-TEX STANDARD 100, our threads are free from harmful substances and environmentally friendly – allowing you to create with confidence while caring for both your craft and the planet. Enhanced Durability and Speed: Made with upgraded trilobal polyester, our threads boast superior strength and lustre, maintaining exceptional performance even at speeds of up to 1000 stitches per minute. For smoother operation with certain colors, we recommend adjusting to speeds of 800-600 stitches per minute. Dependable and Long-Lasting: Simthread embroidery threads are designed to endure daily wear, from washing to perspiration and sunlight. Whether working on delicate or heavy-duty projects, you can count on our threads to maintain their vividness and durability throughout. › See more product details