This Machrus Upper Bounce Jumping Mat is specially designed to fit 38 IN Trampoline Frames of all brands and models, with 32 Springs using 3.5" 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!