welding lenses

No

8 shade can be used for arc welding of 15A (ampere) to 20A

No

9 shade can be used for arc welding of 20A to 40A, mig welding of 40A to 80A, and plasma cutting of 10A to 15A

No

10 shade can be used for arc welding of 40A to 80A, mig welding of 80A to 150A, and plasma cutting of 15A to 30A