8522.90.58.40 - Magnetic recording and reproducing heads

This HTS classification, 8522.90.58.40, specifically covers magnetic recording and reproducing heads. These are the essential components responsible for writing data onto and reading data from magnetic media, such as magnetic tapes or disks. Their primary function is to convert electrical signals into magnetic patterns for recording and magnetic variations back into electrical signals for reproduction. They are critical for the operation of various magnetic recording devices.

This specific subheading distinguishes itself from its sibling, 8522.90.58.80 "Other," by its precise nature. While both fall under "Other" parts of telephone answering machines, 8522.90.58.40 is narrowly defined to include only the magnetic heads themselves. The "Other" sibling would encompass a broader range of components related to telephone answering machines that are not magnetic heads.

As this is a leaf node, there are no further subcategories. Therefore, the classification criteria are focused on identifying a component whose sole or principal purpose is magnetic recording and reproduction, and which is intended for use with the apparatus of heading 8519 or 8521, particularly within the context of telephone answering machines.