... are hot galvanized 4) Special and Extra safty net&mat Trampoline:1) Steel Tubes: Q195, hot dip galvanized inside & outside, ... Rail, Net Poles)2) Jumping Mat: 280g/m2, woven fabric with PP(polypropylene) filament,UV-resistant, Fade-resistant, heavy duty. ( ... & buckles) to poles 6*6mm hexagonal mesh Zipper entrance, bottom with elastic hooks2) Net Poles: Q195, hot dip galvanized inside & outside ...