Brasscraft TBV8 1/2 -Inch Gas Ball Valve, Rough Brass Forged brass body eliminates pinhole leaks commonly associated with cast products Specially designed seat rings PTFE seats assure longer life Quarter-turn design for easy on/off operation Blow-out proof stem assembled from the inside with double o-rings to ensure safe, reliable performance Patented design handle integrates T-Inch and lever handles into one, saving inventory SKU's and dollars