The 33mm boxes of these Tefillin are high quality and durable. The Tefillin are certified Kosher and proofread by an expert as well as by a computer (certificate included). These Tefillin are made for a right hander with a "counter-clockwise strap" and are written in "ktav beit yosef" .  Comes with a beautiful felt tefillin bag and plastic carrying case. Made in Israel.