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Comfort glass filter plate 4-1/2" x 5-1/4" shade 11

This is some information to help you to select the good shade of your lens.
Torch Brazing ...................................3 or 4
up to 1 inch ...................................... 3 or 4
1 to 6 inches ..................................... 4 or 5
6 inches and up ................................ 5 or 6
up to 1/8 inch .................................... 4 or 5
1/8 to 1/2 inch ................................... 5 or 6
1/2 inch and up .................................. 6 to 8
Oxy-Acetylene Flame Spraying ................ 5
Gas-Shield Arc Welding (non-ferrous) .... 11
Gas-Shielded Arc Welding (ferrous) ........ 12
Plasma Flame Spraying ............................ 12
up to 5/32-inch electrodes ........................ 10
3/16 to 1/4-inch electrodes .............. 10 to 12
5/16-inch electrodes and up ............. 12 to 14
Atomic Hydrogen Welding ............... 10 to 14
Carbon Arc Welding and Cutting .............. 14
Comfort glass filter plate 4-1/2