- Ugumu mkubwa na ugumu wa Moh's grade 9
- Mkwaruzo mkubwa na upinzani wa kemikali
- Usakinishaji rahisi kwa kutumia gundi ya resini ya epoxy
- Urekebishaji rahisi ikiwa mtu ataanguka kwenye vigae vya mraba
- Aina mbalimbali za bitana za kauri za alumina zinapatikana
| Bidhaa | Urefu(mm) | Upana(mm) | Unene ikijumuisha Dimple (mm) |
| Kigae cha Kauri chenye mita 5 | 20±0.3 | 20±0.3 | 5/6/7/8/9/10 |
| Kigae cha Kauri chenye dimples 13 | 20±0.3 | 20±0.3 | 5/6/7/8/9/10 |
| Kigae cha Kauri chenye dimples 18 | 20±0.3 | 30±0.5 | 5/6/7/8/9/10 |
| Kigae cha Kauri chenye dimple 13 | 25±0.4 | 25±0.4 | 5/6/7/8/9/10 |
| Kigae cha Hex | 12 | 3/6/10/11/12/20/24/25 | |
| Kigae cha Hex | 19 | 5~25 | |
| Kigae cha Hex | 6 | 3~6 | |
| Kigae cha Mraba | 20 | 20 | 2~10 |
| Kigae cha Mraba | 17.5 | 17.5 | 2~10 |
1) Muundo wa Kemikali:
| Al2O3 | SiO2 | CaO | MgO | Na2O |
| 92~93% | 3~6% | 1~1.6% | 0.2~0.8% | 0.1% |
2) Sifa za kimwili:
| Mvuto maalum (g/cc) | >3.60 |
| Unyevu unaoonekana (%) | 0 |
| Nguvu ya Kunyumbulika (20ºC, MPa) | 280 |
| Nguvu ya kubana (20ºC, Mpa) | 850 |
| Ugumu wa Rockwell (HRA) | 80 |
| Ugumu wa Vickers (hv) | 1050 |
| Ugumu wa Moh (kipimo) | ≥9 |
| Upanuzi wa Joto (20-800ºC, x10-6/ºC) | 8 |
| Ukubwa wa Fuwele (μm) | 1.3~3.0 |