Replacement black and yellow 4'H x 3'W rebound surface and springs designed specifically for the LBT43 Champion Sports Deluxe Lacrosse Ball 4' x 3' Rebounding Target. Target Surface Installation Steps: 1) First, use the hook tool to attach the 8 springs at the 4 corners of the target net to fix the approximate position of the net. 2) Next, use the hook tool to attach 4 springs at the middle of the 4 sides of the target net. 3) Then, use the hook tool to gradually attach the rest of the springs in average to the 4 sides of the target net so that the tension of the target net can be dispersed evenly. 4) Lastly, attach the elastic band hook onto the steel frame so that the target net can fully cover the springs and frame.