JumpKing 12' Trampoline Mat For - 60 Ring, 7" Springs This trampoline Bed (Jumping Surface) is for use on a 12ft Trampoline with 60 Springs that are 7" inch in size. Amount of V-Loops: 60 (Galvanized Steel) V-Rings for Springs Springs Size (NOT INCLUDED): Made For Springs Size 7 Inches Color: Black Material: Heavy Duty Polypropylene, Fade Resistant, UV Resistance