The gray frame set is a replacement for select Steel Pro MAX 18 ft. x 48 in. round above ground pools. This frame set includes the footings and T-connectors needed to assemble the above ground pool. If you need a complete frame set, you’ll also need box 1 (P07360) which includes the top rails and vertical legs. These frame pieces easily connect to your existing pool liner, with no additional tools needed, to get the family fun going again!