CE certified German glass coverslips with Poly-D-lysine coating on both sides for cell culture and confocal / IHC imaging with no autofluorescence. Pre-washed, nitric acid treated, coated with synthetic Poly-D-lysine on both sides and sterile. 25mm diameter round, #1 thickness, 45 pieces/pack. Ready to use directly in cell culture. Coverslips are sealed as 15 pieces per group for easy storage and enhanced cell culture quality. Shelf life 0.5 year when stored in chest freezer. User manual included.