Features: 1) All tubes of verticals and horizontals are high strength grade at 48.3 x 3.25mm 2) The ring plates are at 10mm thickness 3) All tubes of braces are high strength grade at 48.3 x 2.3mm 4) The bolts on braces are high strength grade 5) All items are at hot-dipped-galvanized finishing, unless specified 6) The ends on the horizontals are casting steel