Super duarable.Feature: Low density, High Hardness and Corrosion StrengthDensity: greater than equal 2.48/cm3Microhardness: greater than equal 3500kgf/mm2Flexural strength: greater than equal 400MPaMelting point: 2450 Life for each material: Steel Shot: 2000-2500h, Quartz sand: 1000-1500h, Corundum: 500-1000hDimensions: 35x20mm/1.38x0.79inchBore diameter: 3mm, 4mmModel Number: Sandblasting NozzlePower Type: PneumaticUsage: Home DIYCup Volume: otherApplication: Sandblasting NozzleType: Sandblasting Nozzlecolour:blackMaterial:Boron carbideSize:35x20 x 8mmPackage Contents:2 x Boron carbide nozzleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.