Pyrex 1480 series petri dishes from SciLabwareGeneral specifications:Base and cover dimensions stated are diameter x depth. Pyrex borosilicate glass conforms to the following standards:ISO 3585, DIN 12217 - Type 3.3 borosilicate glassASTM E-438 Type 1 - Class A borosilicate glassUS Pharmacopoeia - Type 1 borosilicate glassEuropean Pharmacopoeia - Type 1 glass