Unused Tokyo Garasu Kikai (TGK) 995-54-42-41 Worthef Experimental Gas Burner with Small Flame Tube, for City Gas 12A 13A, Laboratory Equipment, Experimental Supplies, Experimental Research Burner, Gas Burner Even if the pilot flame goes out, a residual flame remains, making re-ignition convenient. Improved to allow opening, closing, and adjustment via a valve. Fine adjustment of the small flame size is possible. Specifications: Body pipe diameter: 15Φmm, Tip pipe diameter: 18Φmm, Total height: 150Hmm, Outer diameter: 90Φmm Unused item, outer box has damage.