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 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 The actual product may have slight color difference or difference, which not affect the use Colour:Black Material:Boron Carbide Size:80x20x6mm Package Contents: 2 x boron carbide nozzle Only the above package content, other products are not included. Note: Light reflection and different displays may