Our newly designed pull out tray System A is made out of a one piece molded ABS thermoformed plastic and have about a 1 1/2” depth. Molded tray construction makes it easy to clean and requires almost no assembly (which takes about 5 minutes). The only assembly required for System A is snapping on the side tracks and center connectors and screwing the legs onto the corners. System A is only available in select sizes shown in the center insert. Pull out trays may be used without a pull out floor, however we do not recommend excessive weight for System A. Weight limitations vary depending on size. Direct exposure to sunlight may also limit the life of your tray, however new trays can be ordered. If you have a fair amount of weight, are worried about very small animals escaping, or are using the tray for prolonged exposure outdoors, we recommend System B described below. Please call and a customer service representative will help you decide which system is for you. Disposable liners also available for most sizes, call or use our custom price configurator for pricing.