... size 2) trampoline: circular shape 3) trampoline:with strong tube and spring Diameter: 8ft.,10ft.,12ft.,13ft.,14ft.,15ftSprings ... coating: 1.5mm Feature(1).Size:8ft,10ft,12ft,14ft,15ft(2).The frame tube made by ... better bounce on the round trampolines.(6).Normal safety pad,filled with Impact-Resistance EPE foam,thickness ... approved by TUV&GS certification. Sportspower Trampoline with Safety Enclosure