Cat. GG-15- Fibronectin: 15mm diameter, #1 thickness, 60 pieces of CE certified crystal clear German glass coverslips with bovine Fibronectin coating over PDL layer on both sides of coverslips for cell culture and confocal imaging, sealed 15 pieces per bag x 4 = 60, sterilized, ready to use. All pieces are uniformly coated with fibronectin at both side so that you do not need to worry about using a wrong side inside culture well.