Size (W X L): 138 x 81 in. /350.5 x 206 cm. Wind Range: 6 ~ 16 mph Fabric: Ripstop Polyester Frame: Fiberglass Line: Includes 200 ft. 130 lb. Test Line & Winder Case: Fabric case with color hang tags The Thunderbird deltas are very stable fliers in a wide wind range. Sporting some very colorful printed graphics, the Thunderbird has a beautiful bird-like shape and is easy to fly for both children and adults.