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”