Cat. GG-20- Fibronectin: 20mm 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 imaging, sealed 15 pieces per bag x 4 = 60, sterilized, ready to use. Fibronectin is one of the major extracellular matrix protein to support cell growth. It has been proven for long term culture of primary cells and cell lines.