The gray frame set is a replacement for select Power Steel and Steel Pro MAX 13 ft. x 42 in. round above ground pools. Made with corrosion-resistant steel, this frame set includes the top rail and vertical legs needed to assemble the above ground pool. If you need a complete frame set, you’ll also need box 2 (P07356) which includes the footings and T-connectors. These frame pieces easily connect to your existing pool liner, with no additional tools needed, to get the family fun going again!