I would like the explian follow as ;
1st Item. : We are change the size 1.6 mm. to 2.0 mm.
2nd Item : We are usage up and change the size 1.6 and 2.4 to 2.0 mm. only.
3rd Item : the item is Brass rod, Now We have the problem oxide on surface after welding.
4th Item : Current use size 1.6 and 2.4 . We would like change commond the size to 2.0 mm.