The debris, an outboard flap, will be examined further to see if it can provide any clues about the aircraft’s disappearance, Sky News reports.
The aircraft went missing in March 2014 with 239 passengers and crew on board en route from Kuala Lumpur to Beijing.
Investigators previously confirmed a piece of debris found on the French island of Reunion in July 2015 was also part of MH370.
They are examining several other pieces found in Mozambique, South Africa and Rodrigues Island, a territory of Mauritius.
Earlier this week, charred debris, possibly belonging to the missing jet, was handed to the Australian Transport Safety Bureau (ATSB), raising the prospect of a flash fire.
Blaine Gibson, an American lawyer and amateur investigator, said: “One of the theories is that there was a fire on the plane.”
The debris was presented as relatives of some of the victims met Australian officials to discuss progress made by the official search.
The eight family members called on the investigating nations - Australia, China and Malaysia - to do more to uncover evidence, expressing frustration that little has emerged.
A search of a final 120,000sq km (46,000sq mile) zone is due to be completed in December.