BUD Industries NBX-10988 Steel Internal Panel, 12-63/64" Length x 19-3/64" Width x 1/16" Thick, for NEMA Box Used to mount customer equipment inside enclosures Fits enclosure: NBB-10251, 10271, 22251 Assembles to mounting bosses on inside of enclosure 16-Gauge galvanized steel Measures 12-63/64" length by 19-3/64" width by 1/16" thick