Rebounder circular trampoline with Safety Net Safety is highly ensured Can be customed Diameter: 8ft.,10ft.,12ft.,13ft.,14ft.,15ftSprings:Material of springs ... : galvanizedDiameter: 38mmThickness including coating: 1.5mm Feature(1).Size:8ft,10ft,12ft,14ft,15ft(2).The frame tube made by galvanized ... .(8).All trampolines approved by TUV&GS certification. Rebounder circular trampoline with Safety Net