Features: Premium brass combination valves ensures leak proof performances and precise pressure regulation for air pumps and steam systems, featuring 1/2 NPT compatibility and overpressure protection. Engineered with corrosion resistant brass and rapid pressure release design, this safety valves maintains system integrity through best sealing and thermal durability. Ideal for professional and DIY enthusiasts in industrial maintenance, automotive repair, and household plumbing applications requiring reliable gas/steam controls. Safeguards air compressors, steam pipelines, and pressurized equipment in workshops, factories, and residential heating installations from hazardous pressure buildup. brass safety valves combines quick install NPT threading with fail safe operation, delivering industry standard compliance for long term equipment protection across multiple environments. Specifications: Material: brass Size: about 4x4.8cm/1.57x1.89inch Thread: 1/2 Package Includes: 1xSafety valves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.