Forney 42296 Mig Wire, Aluminum Alloy ER4043.035-Diameter, 1-Pound Spool Excellent for welding heat-treatable alloys and offering a lower melting point with better fluidity Aluminum welding wire recommended for welding 3003, 3004, 5052, 6061, 6063, and casting alloys 43, 355, 356 and 214 materials Recommend for use with spool guns for best results Excellent for automotive frames and drive shafts, plus bicycle frames Requires Argon, Argon mix or Argon Helium mix shielding gas (not included)