This Machrus Upper Bounce Jumping Mat is specially designed to fit 12 FT. Trampoline Frames of all brands and models with 80 V-Rings using 7 Springs. Machrus s Upper Bounce Trampoline Jumping Mat features ultra-durability through its premium PP Mesh Material. Furthermore our Jumping Mat also provides extra security with its 8-row stitching thus guaranteeing the mat from tearing. Machrus s Upper Bounce High-Quality Jumping Mat is guaranteed to be UV and water-resistant offering you a safe long-lasting fun investment! The thick replacement trampoline mat ensures absolute safety for your children. The Machrus Upper Bounce trampoline jumping mat provides tremendous jumping momentum and bursting strength for a controlled and responsive jumping experience. Let s go out and play!