Nexelon?? DS1848N HEAVY DUTY WIRE SHELF 48"W X 18"D WITH CLIPS ADDITIONAL HEAVY DUTY SHELVES CUSTOMIZE YOUR HEAVY-DUTY SHELVING UNITS WITH ADDITIONAL SHELVES. SHELVES ADJUST WITHOUT UNIT DISASSEMBLY ON 4 PLASTIC SLEEVES (INCLUDED). THE Nexelon?? FINISH INCLUDES NEX GARD &#, AN ANTI MICROBIAL COMPONENT THAT FIGHTS THE GROWTH OF BACTERIA AND MOLDS AND A LIFETIME LIMITED WARRANTY AGAINST CORROSION. NSF APPROVED.