AW 5.5" Trampoline Mat Round Jump for 13ft Frame 72 Ring Spring Replacement Bounce Mat Size: 140.15" Diam. (excluding rings); Fits 13ft round trampoline with 72 Spring Holes & 5.5"L Springs V-Rings: 72 Reinforced Galvanized V-Rings Sewn into the Mat for Extra Strength Material: polypropylene with carbon coated & galvanized steel Durability: Waterproof Surface, UV-Resistant and Fade-Resistant Security: 8-row Stitching Lines to Hold the V-rings Securely in Place