spec: material: 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 zirconium are viable at JTCCO2008JTC PY alloy zirconium are ideal for spraying stainless, glass sand and silicon carbide, ...