hollow section/Square tube/Rectangle tube/Galvanized square tube/pre-galvanized rectangle tube Standard:JISG3101 ,JISG3466, Grade:Q235, Q345 , SS400, SS540 Product Specification: Dia 15mm - Dia 400mm Treatment : black ,glavanized or use galvanized strip to make pipe SIZE THICKNESS SIZE THICKNESS (mm) (mm) (mm) (mm) 15 x 15 1.0 1.5 20 x 40 1.4 1.8 16 x 16 1.0 1.5 25 x 50 1.4 2.2 20 x 20 1.0 2.5 30 x 40 1.4 3.0 25 x 25 1.0 3.0 30 x 50 2.5 4.0 30 x 30 1.0 3.0 30 x 60 1.7 4.0 32 x 32 1.2 4.0 40 x 50 1.7 4.0 38 x 38 1.2 4.0 40 x 60 1.5 6.0 40 x 40 1.2 4.0 40 x 80 1.5 5.0 50 x 50 1.5 5.0 40 x 100 1.7 5.0 60 x 60 2.0 6.0 50 x 70 1.5 5.0 70 x 70 2.5 4.0 50 x 100 1.5 5.0 75 x 75 2.5 4.0 50 x 120 1.5 5.0 80 x 80 2.0 6.0 60 x 80 1.7 5.0 90 x 90 2.0 6.0 60 x 100 1.5 6.0 100 x 100 2.0 6 60 x 120 1.5 6.0 120 x 120 3.0 8 75 x 125 1.7 6.0 125 x 125 3.0 8 75 x 150 1.5 6.0 130 x 130 4.0 12 80 x 100 1.5 6.0 135 x 135 4.0 14 80 x 120 1.7 6.0 140 x 140 4.0 8 80 x 160 2.5 6.0 150 x 150 4.0 8 100 x 150 2.5 6.0 160 x 160 4.0 8 100 x 180 3.0 6.0 180 x 180 4.0 8 110 x 140 4.0 6.0 200 x 200 5.0 10 120 x 130 4.0 6.0 220 x 220 8.0 25 120 x 140 4.0 6.0 250 x 250 8.0 25 120 x 200 4.0 6.0 280 x 280 8.0 25 150 x 200 3.0 12.0 300 x 300 8.0 25 150 x 250 3.0 12.0 350 x 350 8.0 25 150 x 300 3.0 12.0 400 x 400 8.0 25 200 x 100 2.5 6.0 450 x 450 8.0 25 200 x 300 3.0 13.0 500 x 500 8.0 25 200 x 400 3.0 13.0 We can supply varies sizes as per our respected clients' requirement.please feel free to contact us.