Our trampoline used the galvanize tube. The max weight:150kg 1. Frame tube:38*1.5mm galvanize tube(8ft,10ft) and 42*1.5mm galvanize tube(12ft-16ft) in general.2. Leg tube:38*1.5mm galvanize tube3. Spring:6ft(44pcs),8ft(48pcs),10ft(64pcs),12ft(72pcs),13ft(80pcs),14ft(88pcs),15ft(96pcs),16ft(108pcs) in common, the spring quantity basis on trampoline leg quantity.4. Pad: PVC/PE5. Mat: PP( USA PP)6. ...