Monarch classroom storage units for shallow and deep gratnells trays monarch meq4018 a rack with 18 compartments containing various quantities of shallow or deep gratnells trays each compartment takes one deep tray or two shallow trays the rack holds the trays in three 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