The images at right show three common variants of the inverted nun - vertically flipped, horizontally flipped, and Z-shaped. Other renderings exist, corresponding to alternative interpretations of the term "inverted."
In the Torah, the inverted nuns frame the text
The nuns are generally positioned close to, but not touching, the first and last words of the couplet.
The inverted nun is not part of any word, and never pronounced, thus it is classed as punctuation and not a letter.
|׆||U+05C6||HEBREW PUNCTUATION NUN HAFUKHA|