These are Bifold Mirror Doors that look like new. They have a black Metal Frame around the mirror. Some are 15" wide for each door, but as a panel, it covers 30" in width. You can use two of the panels together so they can enclose a 60" opening. 

Two are 18" wide so one panel covers a 36" opening

They are being sold as a panel as they are alredy hinged together.

They do not come with the track. You would have to make your own or purchase it elsewhere