WeldingCity Nylon Liner 42N-3545-15, 0.035-0.045", 15-foot for Lincoln Magnum and Tweco MIG Welding Guns Premium quality Teflon liner 42T-3545-15 (0.035"-0.045") 15-ft long for Lincoln Tweco MIG welding guns. For soft metal wire MIG welding such as Aluminum etc. Fits Lincoln Magnum 200/250 & Tweco #2 MIG welding gun or equivalents. Please see all listed pictures for parts details and spec. and check your MIG gun details for part compatibility. Strong technical support with experienced customer service to address buyer's any question.