... , HairlineGrade: 200 series, 300 series, 400 seriesFeature:1) Round Bar Outside Diameter: 2mm~260mm2) Hexagonal bar Size: 10- 36mm3) Square bar Size: 5X5mm, 6X6mm, 8X8mm ... , 25X25mm, 28X28mm, 30X30mm, 35X35mm, 40X40mm, 45X45mmmm, 50X50mm 316 Stainless Steel Round Bar