Intex 24' x 52" Metal Frame Swimming Pool with Sand & Saltwater System Combo Set Powder coated steel frames are rust resistance and easy on the eyes No sand or tools needed for setup Reinforced with an all-around band to keep frame legs firmly in place Does not require cartridge replacements (saves time and money) Built-in GFCI (ground fault circuit interrupter) instantly shuts off pump if electrical current comes in contact with water making your swimming experience more safe