Box 0f 50 Duran Wheaton Kimble Microscope Slides - MADE IN GERMANY, Includes box of 18mm x 18mm Cover Glasses Microscope Slides - Made in Germany Pack of 50pcs Produced from high quality float glass (soda-lime glass) of hydrolytic class 3 Virtually free from surface defects, inclusions, streaks and bubbles Microscope slide in standard dimensions 26 x 76 mm (corresponding to ISO 8037/ 1) Planarity and thickness distribution remain within very tight tolerance ranges and are therefore ideally suited to microscopy applications (readjustment of the microscope is not necessary) Glass thickness 1.0±0.05 mm The edges of the glass slides are uniform and crystal clear -> risk of breaking along the edges is reduced and glass splinters are thus prevented Very uniform wettability Cover Slips - Made in China under German QA Pack of 200pcs Complies with ISO 8255-1 Pure white borosilicate glass (D 263® M) is absorption-free in the visible spectral range High optical homogenity of the glass and thus practically free of surface defects, inclusions, streaks, bubbles and annoying streaks due to optimal manufacturing process Highly transparent and colourless (colour neutrality) High flatness enables optimum working conditions Very uniform wettability