SlideMaster provides two types of decks (or trays) as options. One is constructed of 1/2" plywood with a felt covering and a 1" aluminum lip all around. The second type is constructed of 1/8" or 3/16" aluminum with a 1" lip turned up and welded in the corners. Many users construct their own decks of various materials. (Please add 5 days to the lead time for deck/tray option). (Note: The EX aluminum slide unit comes with a deck.)