Camshelving® Premium High Density Mobile Starter Unit, 21"W x 36"L x 67-1/4"H, 4-tier, withstands temperature -36°F (-38°C) to 190°F (88°C), includes: (4) solid polypropylene shelf plates with Camguard® antimicrobial protection, (2) pre-assembled post kits (posts constructed of steel with polypropylene exterior), (8) traverses, molded-in dovetails, (4) high density casters & (4) high density bumpers, 900 lbs. max capacity, speckled gray, NSF