Made of wood.
The ancient syllable “OM” is the shortest of the Mantras and in Indian tradition it is a word suggestive of God.
The scriptures tell us that “OM” is the planets primordial vibration from which the entire universe has arisen. All other sounds are contained within it.
It is believed that “OM” is the mother of all languages. Repetition of “OM” enables us to maintain mental and emotional calmness, overcome obstacles and enable understanding.