... :Aluminum,zinc,iron,brass... 4.Surface:accordingly metal stamping die, progressive die, stamping part, metal stamping dieGeneral Features: 1.Quality Management: ISO9001:2008 ... , A360, A380, ADC 10, ADC 12, ZL102, ZL104, iron, brass, copper zinc etc3.Tolerance: 0.02mm4. Advantage: High quality, low prices ...