Canterbury Blue Flame NKY.12.BRS 12 in. Universal Polish Brass Key This key comes in a polished brass finish. 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 chrome and brass. Assembled Depth: 0.75&#34;. Assembled Height: 12&#34;.