NEXELON® IS THE TOP OF THE LINE BLUE METALLIC FINISH DESIGNED TO HANDLE EXTREME WET, HOT OR COLD ENVIRONMENTS. Nexel® DF1824N Nexelon® Three-Sided Steel Frame 24"W x 18"D NEXEL® DF1824N NEXELON® THREE-SIDED STEEL FRAME 24"W X 18"D CONSTRUCTED OF 1" SQUARE STEEL TUBING, THIS THREE-SIDED FRAME PROVIDES EXTRA STRENGTH AND STABILITY FOR SHELVING UNITS.