As opposed to this, with  the head tefillin too, the strap passes  through an opening, but you can identify it by the  slits that are found here, when we open this  container we can see that there are four chambers  on the inside, each one containing  one portion of tefillin, a portion that is obviously  written by a scribe and not by means of  printing or copying, but rather by handwriting with  ink on a kosher parchment. 