Save money because you "t have to replace the nozzles as often. Lasts longer than tungsten carbide nozzles, while its cost is less. The article ensures a strong constant jet stream because it maintains a maximum time with the same internal diameter. Reduces fatigue in your air compressor caused by worn nozzles that also save money on your electric bill and reduces the chance of replacing overloaded compressor parts. Reduce time to replace nozzles so you can focus on doing the project Specification: Density: 2.48 / cm3 Microhardness: 3500kgf / mm2 Flexural Strength: 400 MPa Melting point: 2450 Celsius Useful life for each material: steel: 2000-2500 h, quartz sand: 1000-1500 h, corundum: 500-1000 h Colour:Black Material:Boron carbide Size:80*20*6 mm Package Contents: 1*Boron Carbide Blast Nozzle Only the above package content, other 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.