<b>This thread set is suitable for: </b> Any home embroidery machine in speed from 300 rpm to 800 rpm. <br> <b>100% quality guaranteed</b><br>Beautiful, vibrant colors and this thread set is a great choice for daily quilting/sewing/embroidery. <br><br><b>Questions & Answers:<br><br>What's the thread Material? <br>---100% Polyester. <br><br> What's the thread size? <br>--- 40wt, that's also called 120D/2.<br> <br>How many meters each spool? <br>--- 1000 meters (1100 yards). <br><br> How many Colors in this set? <br>--- 12 different colors, variegated colors as photo. <br><br>What's the application of these threads?<br>--- Machine embroidery, lace embroidery, thin fabric quilting, sewing etc. <br><br> Where is your factory?<br>--- We are a Chinese factory located in Shanghai, mainly producing embroidery thread, now we are supplying embroidery machine thread to many thread suppliers in the US market. </b>