standard grade: HRB335, HRB400, BS4449 GRADE460B, ASTM A 615 GRADE 40/ ... :1) BS4449 Grade 460 British Standard.2) ASTM A 615 Grade 40-60 American standard3) AS4671-2001 Australia StandardSIZE: 10mm.12mm,14mm ... ,16mm,18mm,20mm,22mm,25mm,28mm,32mmAnd others country standard.