Cat. H-12-PDL: 12mm diameter, #1 thickness, 45 pieces of CE certified crystal clear German glass coverslips with poly-D-lysine coating on both sides for cell culture and confocal fluorescence microscopy, sealed 15 pieces per bag x 3 = 45, sterilized, ready to use. H-12-PDL is a small Half quantity package of GG-12-PDL for testing purposes.