title: Display in additional information tab, some product settings custom fields values
body: <p>I have added some custom fields to the WooCommerce product setting pages in the shipping tab.</p>
  
  <p>I need to make it visible on Product page in Additional Information tab and also that it can be automatically used in compare plugins?</p>
  
  <p>I need that it add the units also as in the existing weight and dimensions field.</p>
  
  <p>Thanks.</p>