Offer your martins a safe and elevated source of eggshells, mealworms, nest material and mud with this unique arrangement of four trays on a convenient rope and pulley system. These rust proof systems have 10' sturdy schedule 40 aluminum poles that can be installed over an aluminum ground stake (included). An aluminum hub holds the 3/8” aluminum support arms. Rope assembly includes a polyester rope with a single pulley and rope winder. Comes with stainless steel hardware.