Profile: Midwest X-Ray Equipment Co. manufactures buckys, trays and grid cabinets. Our cassette trays have features such as linear potentiometers, positive clamps, built-in upright cassette supports, full wrap delrin slides and full bottom cover. They accept all film sizes ranging from 13 to 43 cm. Our size-o-matic buckys are supplied with tray supports and electrical connections. They are used with size-o-matic trays.