Optional anti-newton glass for Omega Glass 5" x 7" sheet film negative carriers as used in Omega E series enlargers. This glass is a single sheet to replace the upper glass only. See separate listings for the the lower glass and for the regular (clear) upper glass.
For reference this glass has nominal dimensions of 125.5 x 179mm and 1.6mm thick (approx 4-15/16" x 7-1/16" x 1/16" thick) with bevels on the short edges.