Square tube S355J2 also called as square hollow section S355J2,the both sides length of tube are the same.Square tube S355J2 surface can be varnish,oil,hot dipped galvanized,shot blasting and painting or black.
Mill certificate:EN 10204 3.1 OR EN 10204 3.2 with ABS,BV,LR Class approval
Specification: EN 10210 AND EN 10219