Features & Details Fits Trampoline Size: The replacement trampoline mat is suitable for 13-foot round trampolines, with 80 V-rings, using 7-inch springs, and a mat diameter of 136 inch. Note: Frame and springs are not included. High-Quality Durable Material: Our trampoline jumping mat is made from PP material with a tightly woven construction, offering high strength, flexibility, anti-slip, wear resistance, and UV resistance for long-lasting use. It features thicker steel rings and higher stitch counts to ensure the V-rings are more secure. How to Measure: To determine compatibility: 1. Measure the diameter of the original trampoline mat. 2. Count the number of V-rings on the original trampoline. 3. Measure the spring length. Jumping Mat Installation Tips: Start by installing the premium trampoline mat at 0°, 180°, 90°, and 270° positions, then evenly install the remaining springs. Included Installation Tools: Our trampoline mat set comes with 1 spring hook and 1 pair of gloves for easier and quicker mat replacement.