Profax® Tregaskiss® PX403-3-45 MIG Gun Consumable, Heavy-Duty Tapered Contact Tip, Style: Threaded, 5/16 Inch Outer Diameter x 1.344 Inch Length, Connection: 5/16-18, Tip Size: 0.054 Inch, Wire Size: 3/64 Inch, For Type/Brand/Model: T30, T40 And T50 Torches