This set of 9 petri dishes is perfect for laboratory use in the healthcare, medical, and dental industries. Each dish measures 60mm x 15mm and is made of high-quality glassware. They are brand new and have never been used, making them an excellent addition to any lab's supplies. These petri dishes are ideal for culture plates and are perfect for use in scientific research and testing. Their sturdy construction ensures that they can withstand the rigors of daily use, and their transparent design allows for easy viewing of contents. These dishes are a must-have for any laboratory that requires reliable and high-quality petri dishes.