1.Standard sizes: Od: 30-250mm Wall thickness: 3-35mm Length: 3-5.8m Tolerance: h8 Straighness: 0.5mm/1000mm Steel grade: 20-45#, 16mn, q345, st52, st 37, etc. Standard: din, gb, astm, api, etc. Non-standard sizes: As cuetomer's request. 2.Surface treatment: Oil painting, galvanized, chromed, or as customer's requirments. 3.Package: Packed in bundle, with plastic caps, plastic bag, etc 4.Delivery time: Within 30 days generally 5.Payment term: T/t, l/c( we prefer t/t)
