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Pack of 10, 24x60 mm Borosilicate Glass Cover Slips, the absolute maximum size for covering almost the entire surface of standard microscope slides.

Pack of 10, 24x24 mm Borosilicate Glass Cover Slips, a large square size used when a slightly wider coverage area is preferred over the 22 mm standard.

Pack of 10, 22x60 mm Borosilicate Glass Cover Slips, the maximum rectangular size for covering entire standard microscope slides.

Pack of 10, 20x20 mm Borosilicate Glass Cover Slips, thin squares for protecting specimens and high-resolution microscopy.

Pack of 10, 18x18 mm Borosilicate Glass Cover Slips, ultra-thin squares used to protect and flatten biological samples on microscope slides.