These spring covers are suitable for your trampoline:

The Spartan 140 cm trampoline spring cover
  5,70 
In Stock
Perimeter crossings though the trampoline legs, sewn in elastic rubber, easy and fast … Buy
Pad for Trampoline Digital 140cm
18,10 € (14%) 15,60 
In Stock
Replacement trampoline pad, easy and quick assembly, prevents injury. Buy
Pad for 140 cm trampoline
17,70 € (10%) 16 
In Stock
Separate protective spring cover for trampoline 140 cm. Buy