Trajan Replaceable Luer Lock Needles: LC, Diameter Outer: 0.019 in., 0.5 mm, Diameter Inner: 0.2 mm, 0.007 in., Needle Gauge: 25 G, Length Needle: 51 mm, 2 in., Needle Point Style: LC, For Use With: Gas chromatography, Stainless Steel, Termination: Luer-lock, Replacement Needle