TRINITY 6Tier NSF 48"x18&rdquo;x77&rdquo; Wire Shelving Rack w/wheels &ndash; Black NSF Approved 800 lbs. per shelf weight capcity easy to assemble, no tools needed, shelves adjustable at 1" increments 6 shelves and 4 casters (2 locking and 2 non-locking) black powder coated finish