Investment Casting , body made of 304 Stainless Steel with superior corrosion resistance to corrosive chemicals, cracking and pitting. Suitable for full range of liquids and gas.Rust-resistant heavy duty lockable lever handle with blue vinyl insulation for manual on and off. Easy to operate, open and close quickly.Each valve individually tested for maximum safety blow-out proof stem, ageing resistant and long service life.Working temperature: -4°F to 356°F.