This is a 147 (12feet 3 ) black trampoline jumping mat. This mat is made of permatron and is designed to fit 14feet round trampoline frames. This trampoline mat is designed to fit with JumpKing Jump Zone and Hedstrom trampolines along with any 14feet frame round trampoline that uses 7.0 springs and has an 88 spring count. Mat Diameter Size: 147 . Mat Ring Count: 88. Mat Spring Size: 7.0 . Mat Material: Permatron. Mat Color: Black. Compatible Trampoline:. Trampoline Size: 14feet. Trampoline Shape: Round. Dimensions: 14.5x6.94x26.57x11.65