Inner Nozzle (Upper Nozzle) is made of tabular alumina, white fused alumina, sintered spinel, flake graphite and anti oxidant.
| Item | LKS-75 | LKS-80 | LKS-85 |
| Al2O3, (%) > | 75 | 80 | 85 |
| C, (%) > | 4 | 3 | 3 |
| Density (g/cm3) | 2.85 | 2.90 | 2.95 |
Functional Refractory Products – Slide Gate PlateFunctional Refractory Products – Collector Nozzle