insulation materials

20 um High Whiteness Fused Silica Powder Melted Quartz Sand for Investment Casting

20 um High Whiteness Fused Silica Powder Melted Quartz Sand for Investment Casting.

Model:OBT-20um

Precision casting use refractory materials high purity fused silica sand 20-50 mesh SiO2 99.7%

Precision casting use high purity fused silica sand 20-50 mesh SiO2 99.7%

Model:OBT-20-50