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Harris Model V3-101-6 V-Series Hand Cutting Tip - 1502137 L-50 What causes the root beadHarris Model V3 101 is a single piece acetylene tip for hand cutting torches. Features Single piece copper hand cutting tip General preheat For use with acetylene Cuts relatively clean steel Compatible with V Series torches Typical applications include construction, maintenance, metal art, etc. Marked with Harris logo and tip size for easy identification One year warranty For best performance, use 3 8 in. ID hose for this size tip