What wire size is the Lincoln Heavy Duty Contact Tip 030 25/pack KP2217-1B1 designed for?

The Lincoln Heavy Duty Contact Tip 030 25/pack KP2217-1B1 is sized for the wire diameter specified in the product title. The contact tip bore must match the wire diameter — a bore that is too tight causes friction and erratic feeding; a bore that is too loose reduces electrical contact quality and increases arc wander. Always verify the contact tip diameter matches your wire spool before welding.