| 1 | Stabe quality on the chemical composition |
| 2 | Perfect grain round shape and various grain sizes |
| 3 | High gas permeability |
| 4 | High temperature resistance |
| 5 | Good break down and fast curing and good release |
| 6 | Perfectly round shape with higher fluidity improves fill-in efficiency while reducing the resin level |
| 7 | Smooth surface of spherical shape greatly improves collapsibility after pouring |
| 8 | Very low thermal expansion ensures fewer or no casting defects such as veining and deformation |
| 9 | Excellent thermal conductivity and heat absorption capacity close to that of Zircon |
| 10 | Superior refractory equivalent to Zircon and Chromites |
