Made of lightweight, chemically resistant polycarbonate and autoclavable at 121°C (250°F), these racks are perfect for use in an incubator Silicone holding strips on the rack's four columns grip each Petri dish and enable the user to easily insert and remove groups of dishes without disturbing upper or lower dishes Labels on the sides of the rack provide space for critical sample identification Dimensions: 24.1cm (9.5 in.) high