The number of eyelets and the diameter of the jumping mat must match for a good bounce. Please install the jumping mat according to the instructions. High Quality replacement trampoline mats with polypropylene material and heavy duty stitching, high strength Vrings for safety replacing UVresistant, Water and fade resistant mat for long time serving Solid, strong springs provide great load bearing ability and perfect elasticity 5 Sizes offered (Frame Size, Mat Size, Spring Size) for convenient to choose your size Features Trampoline Replacement Mat Color: Black Material:PP Size: 10 ft: diameter 244cm, 64 spring V buckles 12 ft: diameter 366cm, 72 spring V buckles 13 ft: diameter 396cm, 80 spring V buckles 14 ft: diameter 427cm, 88spring V buckles 15 ft: diameter 457cm, 90spring V buckles Note: Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. Package Includes: Trampoline Replacement Matx1 Note: Please Check Frame Size, Spring Size, The Number of V before buying