1/2" Male steel G-Style Coupler. 1/2" NPT G style couplers are used in applications that require over 60 SCFM. Milton G style couplers are made of steel and are plated to resist rust. With a 1/2" basic airflow, these plugs offer up to 99 SCFM, making them the highest SCFM rated couplers. Maximum pressure of 300 PSI.
WARNING: Cancer and Reproductive Harmful, www.P65Warnings.ca.gov.