AmScope BS-72P-100S-22 72 Pieces of Pre-Cleaned Blank Microscope Slides and 100 Pieces of 22x22mm Square Coverslips Cover Glass This is a package of pre-cleaned 72 piece clear microscope blank slides and 100 piece 22mmx22mm square glass cover slips 72 piece pre-cleaned blank clear slides, dimensions of slides: 1" x 3" x 0.04" (25.4x76.2x1mm) 100 piece cover slips, dimensions of coverslips: 7/8 x 7/8 x 0.006" (22x22x0.13mm) Material: optical glass Ground edges Quantity: 72 blank slides and 100 coverslips. Dimensions of Slides: 1&#034; x 3&#034; x 0.04&#034; (25.4x76.2x1mm). Dimensions of Cover Slips: 7/8 x 7/8 x 0.006&#034; (18x18x0.13mm). Material: optical glass