NKY.18.BRS 18 UNIV GAS KEY BRASS Universal valve key&#44; key fits both 0.25&#34; and 0.3125&#34; gas valve stems to turn the gas to your 18&#34; of usable length plus handle. The blue flame gas valve key will fit a 0.25&#34; and a 0.3125&#34; gas valve stem. The 18&#34; size key comes in 2 colors to choose from polished chrome and polished brass. Made of Zinc.