Features: 1.The metal bobbins are made of high?quality materials, superb technology, practical and durable. 2.The product is manufactured in accordance with strict quality control standards and has been improved to improve durability 3.Flat aluminum lock core is suitable for flat car; inclined aluminum bobbin is suitable for flat car and embroidery car. 4.The sewing machine boobins is easy to install and easy to use, supporting first?class sewing technology. 5.The product is a perfect choice for you as you like to sew clothes. specification:Item Type: Bobbins Function: Aluminum bobbin for flat car embroidery machine Size: Approx. 8.8 x 20.8 x 6mm / 0.3 x 0.8 x 0.2in Optional Model: 40264A Flat; 272152A Slope PackageList:100 xBobbins