312T-34 Diameter: 0.75" Features: -Tee. -Black finish. -All fittings are pressure tested, 150 PSI. -Zinc coating is applied by hot dip process. -Tapped to American standard oil thread. -For 150 lbs maximum working steam pressure or 300 lbs non-shock working oil, water or gas pressure at ordinary air temperature. -Diameter: 0.13" - 2".