... Middle Duty Storage Shelf 1.Easy assemble and disassemble 2.Anti-rust and corrosion-protection 3.High quality st middle duty storage shelves Product NameMiddle duty storage ... , Backboard-style Supermarket Shelf, Back Wire Supermarket Shelf, Slot-style Back Supermarket Shelf, Hole Back Panel Supermarket Shelf, Heavy- duty Four Post Supermarket Shelf. Adjustable Middle Duty Storage Shelf