Cambro, EXSK2142V4480, Camshelving® Elements XTRA Universal Shelf Kit, 21"W x 42"L, withstands temperature from -36°F (-38°C) to 190°F (88°C), includes vented shelf plates for 4 shelves with Camguard® antimicrobial protection, (8) traverses & (4) bags of 8 dovetails (16 each A & B), speckled gray, NSF listed components, Made in USA (NOTE: This is a new product line. It is NOT compatible with original Elements Series products.)