Midmark Ritter M7 or M9 replacement trays come new. never used.  These trays fit either model of the Midmark Ritter M7 or M9.  This is considered a Small M9 tray or a Large M7 tray. This is only a tray, and NOT the round metal rack structure that supports the tray lip inside the chamber of the machine.  The price listed represents one tray.  Outside Dimensions including lip: 12.625” x 6.5” x .75” Inside Dimensions (area for instruments): 11.678” x 5.5” x .75”