3port air regulator accessory for air compressors 3hole design with one port sized for a pressure gauge and two ports sized for ball valves gauge port: 9.50 mm / 1/8 inch valve ports: 12 mm / 1/4 inch each Pressure regulating valve provides stable, accurate airflow controls output pressure to protect tools from damage caused by overpressure or underpressure helps maintain consistent performance during operation Secure and reliable connections regulator is designed to be tightly fixed to connecting parts resistant to loosening from external vibration or internal airflow impact Durable metal construction sturdy metal material, wear and corrosion resistant not easy to deform, offering a long service life Specifications and compatibility material: metal port sizes: 1 x 1/8 inch gauge port, 2 x 1/4 inch valve ports suitable for standard air compressor setups using common 1/4 inch fittings Use scenarios Woodworking : connect a gauge to monitor and regulate pressure for pneumatic nailers or brad guns, ensuring steady operation and preventing tool damage from pressure spikes. Finishing and spray tasks: use the regulator to supply a controlled, steady air flow to spray equipment, improving consistency and reducing overspray or uneven coating. Dualtool setups or testing: run two air lines from the two 1/4 inch ports, each with its own regulator or valve, to maintain stable pressure when testing or operating multiple tools simultaneously.