This Etan Xchange trampoline jumping mat 305 cm / 10ft is for a trampoline with 72 springs of 16.5 cm. Make sure you measure the outside measurements of the trampoline before ordering this mat and not only the number of springs. For example, there is also a trampoline jumping mat with 72 springs of 14 cm for a 12ft / 366 cm trampoline.
Trampoline springs of 16.5 cm can be ordered separately. The springs are not included.