60WT light weight bobbin fill thread - great choice as bobbin thread, you can use them as top thread with 9 needle for thin fabric or delicate embroidery designs 5500 Yards each king spool. 100% filament polyester fine bobbin thread for tensile strength and durability, does not leave fibers in the bobbin case, better than common spun fiber thread which is dirty requiring more maintenance on the machine 60WT (75D/2) polyester thread is light weight embroidery machine thread, which is perfect shine sewing thread, with a 9 needle, you can use them for the top threading of your machine, such as monogram, small font etc. This stitches out looking like script, light and very clear Polyester filament thread is recommended by Brother, Babylock, Janome etc as embroidery thread. This 60wt fine sewing thread will be the only bobbin thread when you doing machine embroidery. It aides well in machine quilting, free hand quilting etc. sews smoothly on most home sewing embroidery machine Available in 90+ countries - Since 1990, we have been supplying polyester embroidery machine thread to more than 90 countries. Customers love them and want to buy more when they run out of their favorite colors. Please send us a message when you need more in the future, we are happy to help