MULTI RIFLED TUBES,STEEL ASTM 213 T22,TUBE EXTERNAL DIAMETER 63,5 MM (2.1/2”) WITH WALL THICKNESS OF 7,21 MM(MWT 0,284”), A TYPE PROFILE WITH A TOTAL OF 12 RIBS. CURVED TUBE AND WITH CHANFRO AT THE END AS ACCORDING TUBE TYPE ‘A’ TO THE ALUNORTE DRAWING D1-3500-14-M-096-M00-R01