Contact Tip Compatible with Brand Bernard Series Centerfire T Compatible with Series BTB Clean Air Dura-Flux FILTAIR Legacy Q-Gun S-Gun Tip Shape Cylindrical Maximum Wire Diameter 0.072 in Connection Type Non-Threaded For Nozzle Series Centerfire N Series Centerfire NS Series Centerfire NW Series For Gas Diffuser Number D-1 DS-1 DW-1 Welding Processes MIG Welding (GMAW) Material Copper Inside Diameter 0.072 in Outside Diameter 0.35 in Overall Length 1.5 in