Type of sewing thread: Machine thread Silk-like luster. Filament thread with excellent seam appearance. Ace Crown Filament Machine Thread is a high-strength thread with moderate elongation, excellent fastness, and is a top-quality machine thread. In particular, because it uses excellent raw yarn with high heat resistance, it has good sewability and provides beautiful seams. #Olaf 184 Industrial Thread Industrial sewing thread Teijin Tetoron Ace Crown 50 / 3000m HTP (natural) ... 2 pieces Black ... 2 pieces If you would like to change colors or purchase 5 or more, please feel free to comment. We will accommodate you. If you want colored threads, please refer to the sample book. Please comment for stock confirmation. Can also be used with home sewing machines. Brand new, unused. Thank you for viewing. Please read the profile before purchasing. #TeijinTetoron #AceCrown #SewingThread #Industrial #HomeSewingMachineThread