SPC STRUCTURAL PLASTIC SHELVING Withstands extreme temperatures in wet or corrosive environments. High density, black structural plastic resin is ideal for freezers and impervious to oils, salts, acids and most chemicals. Open grid design reduces dust accumulation, increases air and light penetration and promotes drainage. Strong 2 5/8" thick shelves and 2 3/8" diameter posts interlock together to form a rigid assembly. Stationary Shelf Unit has 25" clearance between posts and 20" between shelves. Virtually maintenance free. Steam cleanable. Quick and easy assembly, no tools required.