Expertly wound for your convenience, these bobbins allow you to quickly reload your sewing/quilting machine when your bobbin runs out! They are manufactured by Fil-Tec. We've supplied these bobbins now for several years, so we know they are working well. They're wound with a cotton thread & are available in 6 different neutral colors: white, cream, light tan, light grey, lead grey, and black. These will work perfectly with most Baby Lock/Brother machines (excluding Multi-Needle Embroidery Machines). They're sold in tubes that include 8 bobbins.