Made from polystyrene and certified non-pyrogenic, these dishes are square with the length of each side being equal to 245 mm and with a depth of 18 mm. They are packed with a lid and are designed with a stacking bead so that they will stack securely without slipping. PBA Flexys™ and the Genetix “Q” Bot® automated colony picking and gridding robots Packaging: 4/pk 16/cs