2. The Scrolls

The scrolls are strips of parchment upon which are inscribed four passages from the Torah:

1) Kadesh (Exodus 13:1-10)

2) VeHayah Ki Yeviacha (Exodus 13:11-16)

3) The Shema (Deuteronomy 6:4-9)

4) VeHayah Im Shamoa (Deuteronomy 11:13-21)

In the arm tefillin, the four passages are written on a single scroll. In the head tefillin, they're on four separate scrolls.