This warming shelf unit with 6 tray slots is one from an original unit. This is not a replacement unit but will serve as replacement unit and even better. No plug changes, requiring re-wiring or board changes. Just plug it up and go.

The Harvest Right Freeze Dryer Warming Shelf Unit OEM Six-Tray Large is a heating element designed for built-in/ integrated installation in electric-freeze dryers. This unit, specifically designed for Harvest Right brand use, features a compact size with dimensions of 10-3/4” in height, 21-3/4” in depth, and 9-3/4” in width. The Harvest Right Six-Tray model ensures consistent and efficient drying performance, making it a reliable accessory for your home appliance needs.

A buyer could not lift the entire unit to transport so she disassembled as much as she could. Nothing wrong with this unit, dimensions listed, pictures are accurate including 4-pin plug pics.