The Contracor DVBC Double Venturi Nozzle is a high quality industrial nozzle that is used for blast cleaning. It has a boron carbide core for enhanced performance and an aluminum jacket. The nozzle has gaps midway to facilitate the entry of atmospheric air. This causes a turbulent airflow which increases the size of the blast pattern up to 35% at a slight cost in abrasive velocity. The service life of the nozzle is up to 1000 hours. It fits 50mm thread nozzle holders and has an entry size of 32mm.