Comparison : Item # 900-21T-37, Best Welds MIG Nozzle 3/8" Bore, 1/8" Recess, Tweco Style, Tapered Self Insulated, 2/pk
Item # 900-21-50, Best Welds MIG Nozzle 1/2" Bore, 1/8 Recess, Tweco Style 21, Tapered, Self Insulated, Copper, 1 pc.
Item # 900-22T-37SS, Best Welds MIG Nozzle 3/8" Bore, 1/8 Recess, Tweco Style 22, Tapered, Short Stop, Copper, 2/pk
Item # 900-22-50, Best Welds MIG Nozzle 1/2" Bore, Adjustable, Tweco Style 22, Copper, 1 pc.
Item # 900-22-50SS, Best Welds MIG Nozzle 1/2" Bore, 1/8 Recess, Tweco Style 22, Short Stop, Copper, 1 pc.