Ẓāʾ, or ḏ̣āʾ, is one of the six letters the Arabic alphabet added to the twenty-two inherited from the Phoenician alphabet.
In name and shape, it is a variant of ṭāʾ. Its numerical value is 900.
Ẓāʾ ظَاءْ does not change its shape depending on its... Wikipedia
Arabic: ظ
Position in alphabet: 27