1.hard chrome 2.high quality alloy die steel 3.good surface treatment 4.stable function & high precision 5.reasonable price Casting T-DieContinuous stream surface is available at the die lip. Come with push-pull slightly-spaced adjusting screws reacting to resin pressure and metal movement to bend the flexible die lip and vary the die gap.All surfaces are chromo-plated. Use 12.9 high-strength ...