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Featured exclusively on AirSpade air-excavation tools, supersonic nozzles deliver superior performance vs. competitive nozzles, or open pipes. Patented design turns compressed air into high speed, laser-like jet moving at twice the speed of sound - Mach 2. The result is faster and more efficient excavation, uncovering underground utility lines, and pipes, or even sensitive tree roots without harm. Non-sparking Nickle Aluminum Bronze construction. Compatible with all AirSpade 4000 components and accessories. Features: Non-sparking Nickle Aluminum Bronze constructionPatented internal geometryKnurled surface provides superior grip for tight connectionFemale threaded connection