Place of Origin:Shaanxi China (Mainland) Brand Name:Goodtrust Material:ASTM B337, ASTM B338, ASTM B 861-2005. Outer Diameter: 3-110mm Length:less than 15m Standard: ASTM B337, ASTM B338, ASTM B 861-2005. Application: chemical industry,machinery,medical industry,aerospace,etc.. Technique: Seamless Grade:ASTM B337, ASTM B338, ASTM B 861-2005. Wall Thickness:0.2-5.5mm