midmark ritter m9 autoclave/sterilizer trays - large 002-0374-00 midmark m9 tray midmark ritter m9 replacement trays come new. never used. these trays fit the midmark ritter m9. this is considered a large m9 tray. this is only a tray, and not the round metal rack structure that supports the tray lip inside the chamber of the machine. large m9 tray: outside dimensions including lip: 8” x 12.75” x .75” inside dimensions (area for instruments): 7.25” x 12” x .75”