CE certified High prescision German glass coverslips for cell culture and confocal / IHC imaging with no autofluorescence. Pre-washed, nitric acid treated, sterile. 18mm diameter round, #1.5H thickness, 90 pieces/pack. Ready to use directly in cell culture, or to add your own coating substrate. Coverslips are sealed as 15 pieces per group for easy storage and enhanced cell culture quality. Shelf life 1 year when stored in chest freezer. User manual included.