Contact Set For NC2-330 NC2-400 CJX2-330F CJX2-400F CJX4 GSC2 Moving And Fixed Contacts

grade B:the contact point contains approximately 40% silver,and the color of the contacts are white

grade A: the contact point contains approximately 85% silver,and the color of the contacts are red

grade A plus: the contact point contains approximately 85% silver
The color of the moving contact is black. And the size of the contact point of moving part is bigger than A grade.
and the grade A plus also contains some replacement tools which grade A and grade B doesn't have.And the package of grade A plus is also different from the other two.
Please check the pictures below:
grade A plus one set contains 3 moving parts and 6 fixed parts and replacement kits:

grade A plus package is different from the other two:

grade A one set contains 3 moving parts and 6 fixed parts and without replacement kits:

grade B one set contains 3 moving parts and 6 fixed parts and without replacement kits: