Lincoln Copper Plus Contact Tip 350A, Tapered, .040 in (1.0 mm) 100 pack KP2744 040T B100 wireharness magnum100sg well balanced semiautomatic spool gun Package Size:0.035 in · 500 lb Infinity Pak well balanced semiautomatic spool gun designed for easy and reliable aluminum wire feeding with a variety of CV power sources and engine driven welders Compatible Cutting Attachment Model Number V 1350 Compatible Cutting Tip Model Number Acetylene h3 (Size) V3 101 Compatible Cutting Tip Model Number Alternate Fuel (Size) 3 GPN 0 mm) 100 pack KP2744 040T B100 Copper Plus Larger diameter allows for increased copper content in each contact tip