Pop-Up Targets attach to a tennis net with Velcro in just seconds. They help focus service practice and improvement of many other strokes, including passing shots, service returns and more. These colorful targets are made of impact resistant nylon with a durable metal frame. The opening of each target measures 19" x 22". Each target folds like a pop-up tent into its own compact 15-inch diameter nylon case for easy space saving storage. See the video below for a demonstration. Set includes one red and one blue target.