Certificate: TUV/GSTrampoline: 1. Steel Tubes: (including Frame Tubes, W-Legs, Leg-Extensions, Net Poles) Q195, hot galvanized inside & outside, 120g/m2 zinc-coating 2. Springs: Galvanized outside 3. Jumping Mat: 280g/m2, Woven fabric with PP filament UV-resistant, Fade-resistant, Heavy duty...