... Painting-black /red/yellow color, hot galvanized3. Advantage:(1) Low friction coefficient, waterproof, effective sealing system,(2).High accurate steel pipes ... make sure the long lifetime, stable running and good quality.(5).Stable running, good quality and attractive price.4. The ... 3, 500mm(L200/250/300/350/750/950/1400MM etc)5. Applicationthe steel industry, harbor, coal industry, power industry, ...