Blast Ninja NozzlesReduce Noise and Increase Performance. Quiet Nozzle Tungsten carbide lining providing long life and durability. A lightweight polyurethane jacket to reduce operator fatigue. 1-1/4″ polyurethane or 50mm contractor threads. Proprietary noise reduction technology. Pro Quiet Nozzle Proprietary lightweight lining providing half the weight of tungsten but just as durable. Lightweight polyurethane jacket to reduce operator fatigue. 1-1/4″ brass threads. (50mm contractor threads available upon request) Proprietary noise reduction technology.