Midmark Ritter M11 replacement trays come new. never used.  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 – either small or large.  Small Trays: Outside Dimensions including lip: 16.125” x 7.75” x 1” Inside Dimensions (area for instruments): 14.75” x 6.5”x 1”  Large Trays: Outside Dimensions Including Lip: 16.25” x 10.25” x 1.125” Inside Dimensions (are for instruments): 14.75” x 9” x 1.125”