1.Standard:ANSI,GB,JIS,BS,DIN. 2.Surface:Galvanized 3.Technique: ... :21.1~74.7mm.4.Technique:Hot-dipped galvanized.5.Standard: American Standard (ASTM B16.9/ASTM B16.28/ASTM B16.11/MSS ... SP-43/75/79), Russian Standard ( DIN/2605/2617/, GB12459/T13401) , Japanese Standard ( JIS B2311-1997), and other ...