This professional-grade blowgun with 1/8 female coupler and 1/4 or 3/8 male NPT plugs is an essential tool for HVAC and air duct cleaning professionals, as well as dryer vent cleaning technicians. The precision-engineeroed valve allows you to control PSI pressure with ease and accuracy during your cleaning operations. Featuring durable brass construction with a comfortable blue grip handle, this valve provides reliable performance in demanding work environments. The versatile coupling system accommodates both 1/4 and 3/8 male NPT connections, making it compatible with a wide range of pneumatic equipment and hoses. Whether you're performing routine maintenance or tackling challenging cleaning jobs, this valve gives you the control you need to work efficiently and safely.