AIR NOZZLE|Guardair’s Original Safety Air Gun has a durable cast aluminum body with a patented protective air cone to protect against dangerous chip fly-back. It also features a venturi nozzle that draws in ambient air to intensify both power and thrust. A knurled adjusting nut controls air volume. This model is the best for cleaning machine tools, woodworking, textile and other production equipment. ¼” NPT female inlet. Meets OSHA standards.