4 Vintage Aluminum Houseware Server Steak Platters Sizzling Plates made in Japan.  Wear to the aluminum plates consistent with use and age.  The holders are in nice condition for their age and use - also some scratches and wear.  The assembled units are about 14.5 inches long by 8.25 inches wide.   I think they are made of melamine.  Please see my photos - they are part of the description - and feel free to ask questions.