WeldingCity 10-pk Heavy Duty Contact Tip 11H-30 for Lincoln Tweco Magnum Mini MIG Welding Guns Premium quality Lincoln/Tweco style heavy duty contact tip 11H-30 0.030" Work with gas diffuser 35-50, 51 and 51-23 in Lincoln Magnum 100L or Tweco Mini/#1 MIG guns or equivalent guns. You get Ten (10) contact tips at this price. We use U.S. Postal Service (USPS) as main carrier. Please provide a USPS deliverable address.