... steel ,or A3 steel, also can with pu cover2,Railing: Tempered glass, 8-12mm thick. or fitting drill with steel wire/ cable ... , Φ5mm.3,Tread / skirting: 10mm+1.52mmPVB+ 10mm Laminted ( tempered) glass4,Keel / backbone: A3steel , normal surface finish can be flash ... each 6m wrap by bubble bag, then packed in carton. tempered glass pack in wooden case with polyfoam, irregualr shape keels packed ...