I know spool caps might not be the height of conversation at dinner parties but selecting the wrong size to use on your sewing machine may cause tension issues. As the owner of two sewing machine dealerships, I hear about tension issues on sewing machines a lot. You want to choose a spool cap that is the same size or smaller than the spool of thread that you are using. Maybe you bought a Janome machine and it came with some of these little guys. Most people have no idea what they are or when to use them. These are the Specialty Spool Caps from Janome. These are the perfect size to use with Aurifil large spools and Mettler Metrosene threads. You can see in the photo just how nice these fit on the end of the spool. This is perfect for making sure that the thread comes off the spool smoothly all the way to the very end! If these..