high voltage electrical 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 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