1.Best price and delivery. 2.WT:0.5-30mm. 3.Professional packing. ... #20 #45 St37 St52 St42 St35 API155Product CategoryMetallurgy, Mineral & EnergyTechniqueWelded,ERW Cold Rolled,Hot RolledSurfaceBared, Galvanized, Black Oiled,Or Other Anti ... large company specializing in the production and selling of square, round, rectangular pipe surfaced with galvanized coating, polish, black painting and oiled ...