Material: colored glass  (CHINA)

Cut off Type Glass 

Ultraviolet Glasses

Golden (Yellow) Glasses

Orange Glass

Red Glass

Infrared Glass 

Selective Absorption Type Glass

Specification

Dimension tolerance:    0.1mm

Surface quality:           60-40 scratcg and dig

Flatness:                     l/4 @632.8nm per inch

Parallelism:                 < 1 arc minute

Protective Bevel

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