MTN OutdoorGear 18'x18' Deluxe Square Sun Sail Shade (Sand) with Hardware 18' Square Shade Sail, tension mounted steel D-rings double stitched into the corners. (sail shade is measured from D ring to D ring) 4' of weather-resistant polypropylene rope for each corner, 2 Turnbuckles, 2 Carabiners, 4 Padeyes. Please note all sail shade edges do curve inwards for aesthetics and durability. and carrying case.