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70 30 in wide shelving unit products are offered for sale by suppliers on Alibaba.com, of which stacking racks & shelves accounts for 87%, bookcases accounts for 4%. A wide variety of 30 in wide shelving unit options are available to you, You can also choose from warehouse storage, supermarket and tool rack 30 in wide shelving unit,as well as from powder coating 30 in wide shelving unit and whether 30 in wide shelving unit is cold rolled steel, stainless steel, or steel q235.