I-Zirconium core, esetshenziselwa i-tundish nozzle.
Izici eziyinhloko:
1. Ukumelana nokugqwala okuhle, akukho ukwanda kobubanzi obusobala, impilo ende yesevisi, akukho ukugeleza kokuchezuka, isenzakalo sokuhlakazeka;
2. Ukusebenza kokushaqeka okushisayo kuhle, ukusebenza kokumelana nokuqhuma kuhle kakhulu;