These Tefillin Gassot Miksheh are high-quality as far as Kashruth and quality are concerned. The boxes are hand-made from a single piece of leather apart from the bottom part of the Tefillin where another piece of leather is added. The straps are made from the top part of the hide (Retsuot Elyon).

The Kosher Tefillin are made in Israel by Pe'er HaSTaM and come with certification proving their Kashruth and having been checked by a computer. The Tefillin are also checked by an expert.

Ktav Beit Yossef or Ari?
The most common script is called beit yosef since it is the form prescribed by Rabbi Yosef Caro in the Shulchan Aruch - the primary work of Jewish law. However, the great kabbalist Rabbi Yitzchak Luria Ashkenazi promoted a script that differs slightly from beit yosef script in nine letters of the alphabet. This script is called ktav ari - ari being the Hebrew acronym for Rabbi Yitzchak Luria. Most Ashkenazi, non-hassidic Jews, as well as most Sephardi Jews, use the beit yosef script, while most hassidic and kabalistically-oriented Jewish communities use the ktav ari script.

Ashkenazi Beit Yossef - generally used by those following Ashkenazi tradition, from Germany, England, Russia, Lithuanian

Ashkenazi Ari Zal - generally used by those following Chassidic Sefard tradition, from Poland, Galicia, Hungary, Romania, Slovakia

Important to know:
If you are right-handed you wear the Tefillin on the left arm whereas if you are left-handed you wear the Tefillin on the right arm.

Clockwise or CounterClockwise Wrapping Style:
Clockwise wrapping style usually goes with Ktav Ari
CounterClockwise wrapping style usually goes with Ktav Beit Yossef.