Wafer Fused Silica Ø50.8mm Ep.0.5mm
Material : Corning 7980 UV Grade Fused Silica equivalent to 2G quality,
Dimensions : 50.8mm +/- .2mm diameter x .5mm +/- .025mm thick
2'' +/-.0078'' diameter x .0197'' +/- .00098'' thick,
polished both sides 40/20 scratch/dig,