) Thin Wall High-frequency pipe ) Outer diameter: 10-63mm,Thickness: 0.4 - 2.0mm Length <7cm ) Steel grade: Q195,Q195L.Q235 1) Thin Wall High-frequency welded(Galvanized&chrome plated)2) Outer diameter: 10-63mm,Thickness: 0.4 - 2.0mm Length: <7m, 3) Steel grade: Q195,Q195L.Q235 4) Standards: ASTM(A29M), JIS, DIN, EN, BS5) Used for metal funiture frame and other fields.6) Other shape: square, ...