2 boxes of blank glass microscope slides. One is  Trident Dispensa-Slide by Aloe Scientific. They are 3 by 1 inch and 1.1-1.3 mm thick. The other one is from Welch. No specs on that box but they are probably the same. Both are sealed but the cellophane is missing or coming apart in spots. Each box has 1/2 gross.

Thanks for looking!