Ginsberg Scientific Inc. Plastic Petri Dishes with Lid 70mm, 20 Pack (7-1500-9) -

Ensure that the whole class can participate in crucial biology experiments with this affordable economy pack of twenty Petri dishes. Each has a cover and measures 70mm in diameter. Petri dishes are essential lab materials used for growing and studying cultures. Have students grows cultures in their dishes, then observe them up close under the lens of the classroom microscope. These petri dishes are not sterile. Dimensions Approx. 2 5/8" x 1/2" each.