Monarch classroom storage units for various depths of gratnells trays monarch meq1031 this rack has been designed to hold various depths of gratnells trays the rack holds the trays in four vertical columns and has castors for easy movementplease see data sheet for range of tray colour options red yellow blue green cyan pink purple tangerine lime blueberry jelly strawberry jelly kiwi jelly grape jelly lemon jelly white light grey and clearplease enquire before ordering at