Kaukau

The Kanohi Kaukau was the mask of underwater breathing. It allowed the user to breath underwater up to a certain depth. The Kaukau Nuva allowed the user to extend the depth at which this mask would work, and allowed the user to share this power with others.

Tahu, Onua, Pohatu, Kopaka, and Lewa all found Great Kaukau masks, but lost them when they became Toa Nuva.

Known Wearers

 * Gali (Great, but lost after becoming a Toa Nuva)
 * Hahli (Great but powerless, lost at Karzahni where it was replaced with an Elda)
 * Nuhrii (Great, but powerless)
 * Kivi (Great, but powerless)

Nuva
it could possibly be made from the great Ga-Metru disk