AS SEGI ENAM BESI ST41 41 mm PANJANG 500mm (50cm) MILD STELL SOLID BALOK MATERIAL HEXAGON ROD SS400 IRON STEEL BAR AISI 1018 HEXAGONAL BAHAN METAL HEKSAGON LOGAM BATANGAN PADAT PERSEGI 6 PEJAL POTONGAN 41mm GOOD QUALITY mili ST 41 INDUSTRIAL GRADE mili