The Conbraco Industries 26-304-01 Compression Gauge Cock is a high-quality brass valve designed for controlling and isolating pressure gauges in HVAC systems. Featuring a 1/2" MNPT connection and durable satin brass construction, it ensures reliable performance and corrosion resistance. https://www.partshnc.com/26-304-01-conbraco-industries-12-satin-gauge-cock