Tefillin are translated into English as Phylacteries. At Nellie's Nauticals we are passionate about helping Jewish people acquire kosher Tefillin. You will find a wide range of prices for our Tefillin. Quality and kashrut level is directly linked to the Tefillin's cost allowing your purchase to be relevant to your need. All our Tefillin are handmade in Israel by Pe'er Hastam and all but the standard come with an authorization certificate verifying their Kashruth. He employs a team of scribes who are familiar with the intricate laws and have years of experience and expertise in writing holy scrolls. The Tefillin are Kosher and proofread by an expert as well as by a computer. These Tefillin come with a ten year warranty. 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.