Steel Pipe, Greenhouse, Container House manufacturer / supplier in China, offering Fin Steel Tubes 12X18h10t 12X18h12t 12X18h9t GOST5632, Spiral Welded Fin Tubes 15X5m 12X18h10t GOST9941 GOST5632, Spiral Welding Stainless Fin Tubes 12X18h10t GOST9941 GOST5632 and so on.