PS. cellGrade™ plus surface, sterile, hydrophilic with different chemical groups, such as carboxyl and hydroxyl groups, that are freely accessible. Cover with condensation rings. Manufactured according to the requirements in ANSI/SLAS Standards 1 and 4. BIO-CERT® CELL CULTURE QUALITY: Free of human DNA, RNase, DNase, Pyrogens and non cytotoxic