... : boron carbide, tungsten carbide,alloy dia of orific: from 2.6mm-13.8mm detailed spec:2008 sand blast nozzle is a kind ... of hardness nozzle use for surface peeling, rust remove,and sand blasting , it feature long using life ,boron carbide,tungsten carbide,Alloy ... be 800H if working 8 H continuous.2008WC tungsten carbide nozzle is the most hardness nozzle, density:8.0g/cm3. Hardness:120degree,working ...