A metal cap, metal body, and metal part pen typically refers to a pen that is constructed with high-quality metal components. Here’s a description of each part:

1. Metal Cap: The cap of the pen is made from metal, offering a sleek and durable design. It usually serves to protect the pen’s writing tip and prevent ink from drying out. It may also feature a clip for easy attachment to pockets or notebooks.
2. Metal Body: The body of the pen is also made from metal, providing a sturdy and premium feel. Metal pens are often heavier than plastic pens, giving them a more substantial and balanced weight when writing. This can contribute to a more comfortable and stable writing experience.
3. Metal Part (Nib or Tip): The tip or nib of the pen, made from metal, is where the ink flows onto the paper. This part is typically engineered for precision and durability, ensuring smooth writing without skipping. In ballpoint pens, it may have a small ball at the end that disperses ink evenly.