Binzel heavy duty M8 x 1.2mm contact tips are suitable for use with MB40 and MB501 MIG welding guns.
140.0445 1.2mm M8 contact tip CuCrZr Heavy duty made from Chrome zirconia Copper, which has the same electrical conductivity as pure copper but has improved mechanical properties and heat resistance prolonging tip life.
Normally identified with a continuous line machined around the tip circumference.