How long was Noah's Ark (peace be upon him), how many decks did it have, and what material was it made of?

There is no benefit in researching names or attributes that Allah and His Messenger have not clarified, such as the name or color of the People of the Cave's dog, or the part of the cow of the Children of Israel with which the slain man was struck, or the name of the boy Khidr killed, or the details of Noah's Ark.