Brand GmbH & Co. KG Hemacytometer cover glass, Boro 3.3, for counting chambers, 20 x 26 x 0.4 mm, DIN ISO 8255-1, 10 x 10 pc/PAK

Borosilicate glass, DIN ISO 8255.Refractive index ne = 1.52 ± 0.01, Abbe number ve = 56.5 ± 0.5. Flatness tolerance ± 3 µm. They differ from ordinary cover glasses by their plain ground and polished surface. Packing: 2 cover glasses in a plastic bag, separated by tissue paper.