Bobbins (Coil Formers), Mounts, HardwareBobbins, or coil formers, are components that are used to hold and shape the windings of a transformer or inductor. They are typically made of a insulating material, such as plastic or fiberglass, and have a cylindrical shape with slots or holes for the windings to be passed through. Bobbins help to maintain the proper shape and spacing of the windings, which is important for ensuring the transformer or inductor performs properly. They also provide mechanical support for the windings and protect them from damage. In addition to bobbin, transformer and inductor components also include mounts and hardware, such as screws, nuts, and washers, which are used to attach the transformer or inductor to a circuit board or other supporting structure.